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1.
J Int AIDS Soc ; 27 Suppl 1: e26265, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38965982

RESUMO

INTRODUCTION: Improving the delivery of existing evidence-based interventions to prevent and diagnose HIV is key to Ending the HIV Epidemic in the United States. Structural barriers in the access and delivery of related health services require municipal or state-level policy changes; however, suboptimal implementation can be addressed directly through interventions designed to improve the reach, effectiveness, adoption or maintenance of available interventions. Our objective was to estimate the cost-effectiveness and potential epidemiological impact of six real-world implementation interventions designed to address these barriers and increase the scale of delivery of interventions for HIV testing and pre-exposure prophylaxis (PrEP) in three US metropolitan areas. METHODS: We used a dynamic HIV transmission model calibrated to replicate HIV microepidemics in Atlanta, Los Angeles (LA) and Miami. We identified six implementation interventions designed to improve HIV testing uptake ("Academic detailing for HIV testing," "CyBER/testing," "All About Me") and PrEP uptake/persistence ("Project SLIP," "PrEPmate," "PrEP patient navigation"). Our comparator scenario reflected a scale-up of interventions with no additional efforts to mitigate implementation and structural barriers. We accounted for potential heterogeneity in population-level effectiveness across jurisdictions. We sustained implementation interventions over a 10-year period and evaluated HIV acquisitions averted, costs, quality-adjusted life years and incremental cost-effectiveness ratios over a 20-year time horizon (2023-2042). RESULTS: Across jurisdictions, implementation interventions to improve the scale of HIV testing were most cost-effective in Atlanta and LA (CyBER/testing cost-saving and All About Me cost-effective), while interventions for PrEP were most cost-effective in Miami (two of three were cost-saving). We estimated that the most impactful HIV testing intervention, CyBER/testing, was projected to avert 111 (95% credible interval: 110-111), 230 (228-233) and 101 (101-103) acquisitions over 20 years in Atlanta, LA and Miami, respectively. The most impactful implementation intervention to improve PrEP engagement, PrEPmate, averted an estimated 936 (929-943), 860 (853-867) and 2152 (2127-2178) acquisitions over 20 years, in Atlanta, LA and Miami, respectively. CONCLUSIONS: Our results highlight the potential impact of interventions to enhance the implementation of existing evidence-based interventions for the prevention and diagnosis of HIV.


Assuntos
Análise Custo-Benefício , Infecções por HIV , Homossexualidade Masculina , Profilaxia Pré-Exposição , Humanos , Infecções por HIV/prevenção & controle , Infecções por HIV/epidemiologia , Infecções por HIV/diagnóstico , Masculino , Profilaxia Pré-Exposição/métodos , Profilaxia Pré-Exposição/economia , Epidemias/prevenção & controle , Estados Unidos/epidemiologia , Adulto , Georgia/epidemiologia , Los Angeles/epidemiologia , Florida/epidemiologia , Adulto Jovem , Teste de HIV/métodos
2.
J Biomed Sci ; 31(1): 73, 2024 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-39010093

RESUMO

Enteroviruses (EVs) are the most prevalent viruses in humans. EVs can cause a range of acute symptoms, from mild common colds to severe systemic infections such as meningitis, myocarditis, and flaccid paralysis. They can also lead to chronic diseases such as cardiomyopathy. Although more than 280 human EV serotypes exist, only four serotypes have licenced vaccines. No antiviral drugs are available to treat EV infections, and global surveillance of EVs has not been effectively coordinated. Therefore, poliovirus still circulates, and there have been alarming epidemics of non-polio enteroviruses. Thus, there is a pressing need for coordinated preparedness efforts against EVs.This review provides a perspective on recent enterovirus outbreaks and global poliovirus eradication efforts with continuous vaccine development initiatives. It also provides insights into the challenges and opportunities in EV vaccine development. Given that traditional whole-virus vaccine technologies are not suitable for many clinically relevant EVs and considering the ongoing risk of enterovirus outbreaks and the potential for new emerging pathogenic strains, the need for new effective and adaptable enterovirus vaccines is emphasized.This review also explores the difficulties in translating promising vaccine candidates for clinical use and summarizes information from published literature and clinical trial databases focusing on existing enterovirus vaccines, ongoing clinical trials, the obstacles faced in vaccine development as well as the emergence of new vaccine technologies. Overall, this review contributes to the understanding of enterovirus vaccines, their role in public health, and their significance as a tool for future preparedness.


Assuntos
Infecções por Enterovirus , Enterovirus , Vacinas Virais , Humanos , Infecções por Enterovirus/epidemiologia , Infecções por Enterovirus/prevenção & controle , Infecções por Enterovirus/virologia , Enterovirus/imunologia , Vacinas Virais/imunologia , Desenvolvimento de Vacinas , Surtos de Doenças/prevenção & controle , Epidemias/prevenção & controle
3.
Sci Rep ; 14(1): 15910, 2024 Jul 10.
Artigo em Inglês | MEDLINE | ID: mdl-38987306

RESUMO

Mass vaccinations are crucial public health interventions for curbing infectious diseases. Canine rabies control relies on mass dog vaccination campaigns (MDVCs) that are held annually across the globe. Dog owners must bring their pets to fixed vaccination sites, but sometimes target coverage is not achieved due to low participation. Travel distance to vaccination sites is an important barrier to participation. We aimed to increase MDVC participation in silico by optimally placing fixed-point vaccination locations. We quantified participation probability based on walking distance to the nearest vaccination site using regression models fit to participation data collected over 4 years. We used computational recursive interchange techniques to optimally place fixed-point vaccination sites and compared predicted participation with these optimally placed vaccination sites to actual locations used in previous campaigns. Algorithms that minimized average walking distance or maximized expected participation provided the best solutions. Optimal vaccination placement is expected to increase participation by 7% and improve spatial evenness of coverage, resulting in fewer under-vaccinated pockets. However, unevenness in workload across sites remained. Our data-driven algorithm optimally places limited resources to increase overall vaccination participation and equity. Field evaluations are essential to assess effectiveness and evaluate potentially longer waiting queues resulting from increased participation.


Assuntos
Doenças do Cão , Raiva , Zoonoses , Animais , Raiva/prevenção & controle , Raiva/veterinária , Raiva/epidemiologia , Zoonoses/prevenção & controle , Zoonoses/epidemiologia , Humanos , Cães , Doenças do Cão/prevenção & controle , Doenças do Cão/epidemiologia , Vacina Antirrábica/administração & dosagem , Vacina Antirrábica/imunologia , Vacinação , Vacinação em Massa/métodos , Vacinação em Massa/estatística & dados numéricos , Algoritmos , Epidemias/prevenção & controle
4.
J Int AIDS Soc ; 27 Suppl 2: e26245, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38982894

RESUMO

INTRODUCTION: The HIV Prevention 2025 Roadmap, developed by UNAIDS, recommends the adoption of a precision prevention approach focused on priority populations and geographies. With reduction in new HIV acquisitions in many countries, designing a differentiated HIV prevention response, using a Programme Science approach, based on the understanding of the epidemic and transmission dynamics at a sub-national level, is critical. METHODS: To support strategic planning, an epidemic appraisal at the sub-national level across 47 counties, with the 2019 population ranging from 0.14 million in Lamu to 4.40 million in Nairobi City, was conducted in Kenya using several existing data sources. Using 2021 Spectrum/EPP/Naomi model estimates of national and sub-national HIV incidence and prevalence, counties with high HIV incidence and prevalence were identified for geographic prioritization. The size of local key population (KP) networks and HIV prevalence in key and general populations were used to define epidemic typology and prioritize populations for HIV prevention programmes. Analysis of routine programme monitoring data for 2021 was used to assess coverage gaps in HIV prevention programmes, including prevention of vertical transmission, anti-retroviral therapy, KP programmes, adolescent girls and young women programme, and voluntary male medical circumcision programme. RESULTS: Ten counties with more than 1000 incident acquisitions in 2021 accounted for 57% of new acquisitions. Twenty-four counties were grouped into the concentrated epidemic type-due to their low prevalence in the general population, high prevalence in KPs and relatively higher density of female sex workers and men who have sex with men populations. Four counties reflected a generalized epidemic, where HIV prevalence was more than 10% and 30%, respectively, among the general and key populations. The remaining 19 counties were classified as having mixed epidemics. Gaps in programmes were identified and counties where these gaps need to be addressed were also prioritized. CONCLUSIONS: The HIV burden in Kenya is unevenly distributed and hence the mix of prevention strategies may vary according to the epidemic typology of the county. Prioritization of programmes based not only on disease burden and epidemic typology, but also on the prevailing gaps in coverage for reducing inequities is a key aspect of this appraisal.


Assuntos
Infecções por HIV , Humanos , Quênia/epidemiologia , Infecções por HIV/epidemiologia , Infecções por HIV/prevenção & controle , Infecções por HIV/transmissão , Masculino , Prevalência , Feminino , Adolescente , Incidência , Epidemias/prevenção & controle , Adulto , Adulto Jovem
5.
J Math Biol ; 89(2): 25, 2024 Jul 04.
Artigo em Inglês | MEDLINE | ID: mdl-38963509

RESUMO

The Ebola virus disease (EVD) has been endemic since 1976, and the case fatality rate is extremely high. EVD is spread by infected animals, symptomatic individuals, dead bodies, and contaminated environment. In this paper, we formulate an EVD model with four transmission modes and a time delay describing the incubation period. Through dynamical analysis, we verify the importance of blocking the infection source of infected animals. We get the basic reproduction number without considering the infection source of infected animals. And, it is proven that the model has a globally attractive disease-free equilibrium when the basic reproduction number is less than unity; the disease eventually becomes endemic when the basic reproduction number is greater than unity. Taking the EVD epidemic in Sierra Leone in 2014-2016 as an example, we complete the data fitting by combining the effect of the media to obtain the unknown parameters, the basic reproduction number and its time-varying reproduction number. It is shown by parameter sensitivity analysis that the contact rate and the removal rate of infected group have the greatest influence on the prevalence of the disease. And, the disease-controlling thresholds of these two parameters are obtained. In addition, according to the existing vaccination strategy, only the inoculation ratio in high-risk areas is greater than 0.4, the effective reproduction number can be less than unity. And, the earlier the vaccination time, the greater the inoculation ratio, and the faster the disease can be controlled.


Assuntos
Número Básico de Reprodução , Ebolavirus , Doença pelo Vírus Ebola , Conceitos Matemáticos , Modelos Biológicos , Doença pelo Vírus Ebola/transmissão , Doença pelo Vírus Ebola/prevenção & controle , Doença pelo Vírus Ebola/epidemiologia , Número Básico de Reprodução/estatística & dados numéricos , Humanos , Animais , Serra Leoa/epidemiologia , Ebolavirus/patogenicidade , Ebolavirus/fisiologia , Epidemias/estatística & dados numéricos , Epidemias/prevenção & controle , Simulação por Computador , Modelos Epidemiológicos , Surtos de Doenças/prevenção & controle , Surtos de Doenças/estatística & dados numéricos
6.
BMC Prim Care ; 25(1): 260, 2024 Jul 17.
Artigo em Inglês | MEDLINE | ID: mdl-39020314

RESUMO

BACKGROUND: Community Health Workers (CHWs) play a crucial role in outbreak response, including health education, contact tracing, and referral of cases if adequately trained. A pilot project recently trained 766 CHWs in Wakiso district Uganda on epidemic and pandemic preparedness and response including COVID-19. This evaluation was carried out to generate evidence on the outcomes of the project that can inform preparations for future outbreaks in the country. METHODS: This was a qualitative evaluation carried out one year after the project. It used three data collection methods: 30 in-depth interviews among trained CHWs; 15 focus group discussions among community members served by CHWs; and 11 key informant interviews among community health stakeholders. The data was analysed using a thematic approach in NVivo (version 12). RESULTS: Findings from the study are presented under four themes. (1) Improved knowledge and skills on managing epidemics and pandemics. CHWs distinguished between the two terminologies and correctly identified the signs and symptoms of associated diseases. CHWs reported improved communication, treatment of illnesses, and report writing skills which were of great importance including for managing COVID-19 patients. (2) Enhanced attitudes towards managing epidemics and pandemics as CHWs showed dedication to their work and more confidence when performing tasks specifically health education on prevention measures for COVID-19. (3) Improved health practices such as hand washing, vaccination uptake, and wearing of masks in the community and amongst CHWs. (4) Enhanced performance in managing epidemics and pandemics which resulted in increased work efficiency of CHWs. CHWs were able to carry out community mobilization through door-to-door household visits and talks on community radios as part of the COVID-19 response. CHWs were also able to prioritize health services for the elderly, and support the management of patients with chronic diseases such as HIV, TB and diabetes by delivering their drugs. CONCLUSIONS: These findings demonstrate that CHWs can support epidemic and pandemic response when their capacity is enhanced. There is need to invest in routine training of CHWs to contribute to outbreak preparedness and response.


Assuntos
COVID-19 , Agentes Comunitários de Saúde , Pandemias , Humanos , Agentes Comunitários de Saúde/educação , Uganda/epidemiologia , Projetos Piloto , COVID-19/prevenção & controle , COVID-19/epidemiologia , Pandemias/prevenção & controle , Feminino , Masculino , Adulto , Pesquisa Qualitativa , Fortalecimento Institucional , Epidemias/prevenção & controle , SARS-CoV-2 , Pessoa de Meia-Idade , Grupos Focais , Conhecimentos, Atitudes e Prática em Saúde
8.
PLoS One ; 19(6): e0304375, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38935766

RESUMO

Hepatitis B virus (HBV) infection is a global public health issue. We offer a comprehensive analysis of the dynamics of HBV, which can be successfully controlled with vaccine and treatment. Hepatitis B virus (HBV) causes a significantly more severe and protracted disease compared to hepatitis A. While it initially presents as an acute disease, in approximately 5 to 10% of cases, it can develop into a chronic disease that causes permanent damage to the liver. The hepatitis B virus can remain active outside the body for at least seven days. If the virus penetrates an individual's body without immunization, it may still result in infection. Upon exposure to HBV, the symptoms often last for a duration ranging from 10 days to 6 months. In this study, we developed a new model for Hepatitis B Virus (HBV) that includes asymptomatic carriers, vaccination, and treatment classes to gain a comprehensive knowledge of HBV dynamics. The basic reproduction number [Formula: see text] is calculated to identify future recurrence. The local and global stabilities of the proposed model are evaluated for values of [Formula: see text] that are both below and above 1. The Lyapunov function is employed to ensure the global stability of the HBV model. Further, the existence and uniqueness of the proposed model are demonstrated. To look at the solution of the proposed model graphically, we used a useful numerical strategy, such as the non-standard finite difference method, to obtain more thorough numerical findings for the parameters that have a significant impact on disease elimination. In addition, the study of treatment class in the population, we may assess the effectiveness of alternative medicines to treat infected populations can be determined. Numerical simulations and graphical representations are employed to illustrate the implications of our theoretical conclusions.


Assuntos
Simulação por Computador , Vírus da Hepatite B , Hepatite B , Humanos , Hepatite B/epidemiologia , Hepatite B/prevenção & controle , Vírus da Hepatite B/fisiologia , Epidemias/prevenção & controle , Vacinas contra Hepatite B/uso terapêutico , Vacinas contra Hepatite B/administração & dosagem , Número Básico de Reprodução , Vacinação
9.
Sci Rep ; 14(1): 14464, 2024 06 24.
Artigo em Inglês | MEDLINE | ID: mdl-38914575

RESUMO

This study uses imposed control techniques and vaccination game theory to study disease dynamics with transitory or diminishing immunity. Our model uses the ABC fractional-order derivative mechanism to show the effect of non-pharmaceutical interventions such as personal protection or awareness, quarantine, and isolation to simulate the essential control strategies against an infectious disease spread in an infinite and uniformly distributed population. A comprehensive evolutionary game theory study quantified the significant influence of people's vaccination choices, with government forces participating in vaccination programs to improve obligatory control measures to reduce epidemic spread. This model uses the intervention options described above as a control strategy to reduce disease prevalence in human societies. Again, our simulated results show that a combined control strategy works exquisitely when the disease spreads even faster. A sluggish dissemination rate slows an epidemic outbreak, but modest control techniques can reestablish a disease-free equilibrium. Preventive vaccination regulates the border between the three phases, while personal protection, quarantine, and isolation methods reduce disease transmission in existing places. Thus, successfully combining these three intervention measures reduces epidemic or pandemic size, as represented by line graphs and 3D surface diagrams. For the first time, we use a fractional-order derivate to display the phase-portrayed trajectory graph to show the model's dynamics if immunity wanes at a specific pace, considering various vaccination cost and effectiveness settings.


Assuntos
Teoria dos Jogos , Quarentena , Humanos , Vacinação , COVID-19/prevenção & controle , COVID-19/epidemiologia , Modelos Teóricos , Controle de Doenças Transmissíveis/métodos , Epidemias/prevenção & controle
10.
Math Biosci ; 374: 109231, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38914260

RESUMO

We consider an SEIR epidemic model on a network also allowing random contacts, where recovered individuals could either recover naturally or be diagnosed. Upon diagnosis, manual contact tracing is triggered such that each infected network contact is reported, tested and isolated with some probability and after a random delay. Additionally, digital tracing (based on a tracing app) is triggered if the diagnosed individual is an app-user, and then all of its app-using infectees are immediately notified and isolated. The early phase of the epidemic with manual and/or digital tracing is approximated by different multi-type branching processes, and three respective reproduction numbers are derived. The effectiveness of both contact tracing mechanisms is numerically quantified through the reduction of the reproduction number. This shows that app-using fraction plays an essential role in the overall effectiveness of contact tracing. The relative effectiveness of manual tracing compared to digital tracing increases if: more of the transmission occurs on the network, when the tracing delay is shortened, and when the network degree distribution is heavy-tailed. For realistic values, the combined tracing case can reduce R0 by 20%-30%, so other preventive measures are needed to reduce the reproduction number down to 1.2-1.4 for contact tracing to make it successful in avoiding big outbreaks.


Assuntos
Número Básico de Reprodução , Busca de Comunicante , Epidemias , Busca de Comunicante/métodos , Humanos , Epidemias/prevenção & controle , Epidemias/estatística & dados numéricos , Número Básico de Reprodução/estatística & dados numéricos , Modelos Epidemiológicos , Doenças Transmissíveis/epidemiologia , Doenças Transmissíveis/transmissão
11.
BMJ Open ; 14(6): e082757, 2024 Jun 05.
Artigo em Inglês | MEDLINE | ID: mdl-38839384

RESUMO

INTRODUCTION: The surge of public health emergencies over the past decade has disproportionately affected sub-Saharan Africa. These include outbreaks of infectious diseases such as Ebola, Monkeypox and COVID-19. Experience has shown that community participation is key to the successful implementation of infection control activities. Despite the pivotal role community engagement plays in epidemic and pandemic preparedness and response activities, strategies to engage communities have been underexplored to date, particularly in sub-Sahara Africa. Furthermore, reviews conducted have not included evidence from the latest pandemic, COVID-19. This scoping review aims to address these gaps by documenting through available literature, the strategies for community engagement for epidemic and pandemic preparedness and response in sub-Sahara Africa. METHODS AND ANALYSIS: We will use the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews and the methodological framework for scoping reviews from Arksey and O'Malley to guide the review. Two reviewers will develop a systematic search strategy to identify articles published from January 2014 to date. We will retrieve peer-reviewed research published in the English language from databases including Embase, EBSCO-host, PubMed, Global Health, CINAHL, Google Scholar and Web of Science. Additionally, we will search for relevant grey literature from the websites of specific international organisations, public health institutes and Government Ministries of Health in African countries. After the removal of duplicates, the two reviewers will independently screen all titles, abstracts and full articles to establish the relevance of each study for inclusion in the review. We will extract data from the included articles using a data extraction tool and present the findings in tabular form with an accompanying narrative to aid comprehension. ETHICS AND DISSEMINATION: Ethical approval is not required for the conduct of scoping reviews. We plan to disseminate the findings from this review through publications in a peer-reviewed journal, presentations at conferences and meetings with policy-makers.


Assuntos
COVID-19 , Participação da Comunidade , Pandemias , Humanos , África Subsaariana/epidemiologia , COVID-19/epidemiologia , COVID-19/prevenção & controle , Pandemias/prevenção & controle , Participação da Comunidade/métodos , SARS-CoV-2 , Projetos de Pesquisa , Saúde Pública , Epidemias/prevenção & controle , Literatura de Revisão como Assunto , Preparação para Pandemia
12.
Lancet HIV ; 11(7): e489-e494, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38925732

RESUMO

Rates of new HIV acquisition remain unacceptably high in most populations in low-income, middle-income, and high-income settings despite advances in treatment and prevention strategies. Although biomedical advances in primary prevention of new infections exist, systematic scale-up of these interventions has not occurred at the pace required to end AIDS by 2030. Low population coverage, adherence to oral pre-exposure prophylaxis in settings with high rates of HIV acquisition, and the fact that a significant proportion of new HIV infections occurs in populations not identified as high risk and are hence not targeted for prevention approaches impedes current prevention strategies. Although long-acting injectables and monoclonal antibodies are promising approaches to help reduce incidence, high cost and the need for high coverage rates mean that a vaccine or vaccine-like intervention still remains the most likely scenario to produce a population-level impact on HIV incidence, especially in countries with generalised epidemics. Current global efforts are not sufficient to meet 2030 HIV epidemic goals; acknowledgment of this issue is required to ensure persistent advocacy for population-based control of the ongoing HIV pandemic.


Assuntos
Epidemias , Infecções por HIV , Humanos , Infecções por HIV/prevenção & controle , Infecções por HIV/epidemiologia , Epidemias/prevenção & controle , Profilaxia Pré-Exposição , Incidência , Saúde Global
13.
PLoS Comput Biol ; 20(6): e1012182, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38865414

RESUMO

Restrictions of cross-border mobility are typically used to prevent an emerging disease from entering a country in order to slow down its spread. However, such interventions can come with a significant societal cost and should thus be based on careful analysis and quantitative understanding on their effects. To this end, we model the influence of cross-border mobility on the spread of COVID-19 during 2020 in the neighbouring Nordic countries of Denmark, Finland, Norway and Sweden. We investigate the immediate impact of cross-border travel on disease spread and employ counterfactual scenarios to explore the cumulative effects of introducing additional infected individuals into a population during the ongoing epidemic. Our results indicate that the effect of inter-country mobility on epidemic growth is non-negligible essentially when there is sizeable mobility from a high prevalence country or countries to a low prevalence one. Our findings underscore the critical importance of accurate data and models on both epidemic progression and travel patterns in informing decisions related to inter-country mobility restrictions.


Assuntos
COVID-19 , SARS-CoV-2 , Viagem , COVID-19/epidemiologia , COVID-19/transmissão , COVID-19/prevenção & controle , Humanos , Países Escandinavos e Nórdicos/epidemiologia , Viagem/estatística & dados numéricos , Epidemias/estatística & dados numéricos , Epidemias/prevenção & controle , Pandemias/estatística & dados numéricos , Pandemias/prevenção & controle , Prevalência , Biologia Computacional , Dinamarca/epidemiologia
14.
BMC Public Health ; 24(1): 1632, 2024 Jun 19.
Artigo em Inglês | MEDLINE | ID: mdl-38898424

RESUMO

BACKGROUND: To control resurging infectious diseases like mumps, it is necessary to resort to effective control and preventive measures. These measures include increasing vaccine coverage, providing the community with advice on how to reduce exposure, and closing schools. To justify such intervention, it is important to understand how well each of these measures helps to limit transmission. METHODS: In this paper, we propose a simple SEILR (susceptible-exposed-symptomatically infectious-asymptomatically infectious-recovered) model by using a novel transmission rate function to incorporate temperature, humidity, and closing school factors. This new transmission rate function allows us to verify the impact of each factor either separately or combined. Using reported mumps cases from 2004 to 2018 in the mainland of China, we perform data fitting and parameter estimation to evaluate the basic reproduction number  R 0 . As a wide range of one-dose measles, mumps, and rubella (MMR) vaccine programs in China started only in 2008, we use different vaccination proportions for the first Stage I period (from 2004 to 2008) and the second Stage II period (from 2009 to 2018). This allows us to verify the importance of higher vaccine coverage with a possible second dose of MMR vaccine. RESULTS: We find that the basic reproduction number  R 0  is generally between 1 and 3. We then use the Akaike Information Criteria to assess the extent to which each of the three factors contributed to the spread of mumps. The findings suggest that the impact of all three factors is substantial, with temperature having the most significant impact, followed by school opening and closing, and finally humidity. CONCLUSION: We conclude that the strategy of increasing vaccine coverage, changing micro-climate (temperature and humidity), and closing schools can greatly reduce mumps transmission.


Assuntos
Umidade , Caxumba , Instituições Acadêmicas , Temperatura , China/epidemiologia , Humanos , Caxumba/epidemiologia , Caxumba/prevenção & controle , Epidemias/prevenção & controle , Vacina contra Sarampo-Caxumba-Rubéola/administração & dosagem , Criança , Adolescente , Pré-Escolar , Número Básico de Reprodução/estatística & dados numéricos
16.
PLoS One ; 19(6): e0306127, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38924055

RESUMO

To address the epidemic, such as COVID-19, the government may implement the home quarantine policy for the infected residents. The logistics company is required to control the risk of epidemic spreading while delivering goods to residents. In this case, the logistics company often uses vehicles and unmanned aerial vehicles (UAVs) for delivery. This paper studies the distribution issue of cold chain logistics by integrating UAV logistics with epidemic risk management innovatively. At first, a "vehicle-UAV" joint distribution mode including vehicles, small UAVs and large UAVs, is proposed. The green cost for vehicles and UAVs is calculated, respectively. The formula for infection risk due to large numbers of residents gathering at distribution centers to pick up goods is then derived. Furthermore, based on the control of infection risk, an optimization model is developed to minimize the total logistics cost. A modified ant colony algorithm is designed to solve the model. The numerical results show that the maximum acceptable risk and the crowd management level of distribution centers both have significant effects on the distribution network, logistics cost and number of new infections. Our study provides a new management method and technical idea for ensuring the needs of residents during the epidemic.


Assuntos
COVID-19 , Humanos , COVID-19/epidemiologia , COVID-19/prevenção & controle , COVID-19/economia , COVID-19/transmissão , Algoritmos , Quarentena/economia , Dispositivos Aéreos não Tripulados , SARS-CoV-2 , Epidemias/prevenção & controle , Epidemias/economia , Gestão de Riscos/métodos
17.
Int J Drug Policy ; 128: 104435, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38729061

RESUMO

The high overdose mortality rates in the United States poses several questions: Why have they been increasing exponentially since 1979? Why are they so high? And how can they be greatly reduced? Building on past research, the causes of the increase seem to be deeply rooted in US social and economic structures and processes, rather than due only to opioid prescription patterns or the advent of synthetic opioids. Given this, we consider what changes might be needed to reverse the exponentially-increasing overdose mortality. We use a path dependency argument to argue that the United States political, economic, and public health systems have helped create this crisis and, unfortunately, continue to heighten it. These same systems suggest that proposals to expand harm reduction and drug treatment capacity, to decriminalize or legalize drugs, or to re-industrialize the country sufficiently to reduce "communities of despair" will not be enacted at a scale sufficient to end the overdose crisis. We thus suggest that in the United States serious improvements in overdose rates and related policies and structures require massive social movements with a broad social change agenda.


Assuntos
Overdose de Drogas , Redução do Dano , Humanos , Estados Unidos/epidemiologia , Overdose de Drogas/prevenção & controle , Overdose de Drogas/mortalidade , Overdose de Drogas/epidemiologia , Analgésicos Opioides/intoxicação , Política de Saúde , Transtornos Relacionados ao Uso de Opioides/epidemiologia , Transtornos Relacionados ao Uso de Opioides/mortalidade , Transtornos Relacionados ao Uso de Opioides/prevenção & controle , Saúde Pública , Política , Epidemias/prevenção & controle , Epidemia de Opioides/prevenção & controle
18.
Afr J Prim Health Care Fam Med ; 16(1): e1-e12, 2024 Apr 08.
Artigo em Inglês | MEDLINE | ID: mdl-38708735

RESUMO

BACKGROUND: Targeted interventions for key populations remain critical for realisation of epidemic control for human immunodeficiency virus (HIV) infection because of the causal relationship between HIV infection in the general population and among key population groups. AIM: To consolidate evidence on the fast-track interventions towards achieving HIV epidemic control among key populations. METHODS: A rapid scoping review was conducted using the methodological framework by Arksey and O' Malley. The Population, Intervention, Context and Outcome (PICO) framework was used to identify relevant studies using key words with Boolean operators in electronic data bases, namely CINHAL, Web of Science, Psych Info and Sabinet. Studies were extracted using a modified data extraction tool, and results were presented narratively. RESULTS: A total of 19 articles were included in this review. Most articles were primary studies (n = 17), while another involved the review of existing literature and policies (n = 2) and routinely collected data (n = 1). Most studies were conducted in the United States of America (n = 6), while another were conducted in China, Kenya, Botswana, South Africa and Mozambique. All studies revealed findings on tested interventions to achieve HIV epidemic control among key populations. CONCLUSION: Effective interventions for HIV epidemic control were stand-alone behavioural preventive interventions, stand-alone biomedical preventive strategies and combination prevention approaches. Furthermore, the findings suggest that effective activities to achieve HIV epidemic control among key populations should be centred around prevention.Contribution: The findings of this study have policy and practice implications for high HIV burden settings such as South Africa in terms of interventions to facilitate realisation of the Joint United Nations Programme on HIV/AIDS (UNAIDS) 95-95-95 targets, thereby contributing to HIV epidemic control.


Assuntos
Epidemias , Infecções por HIV , Humanos , Infecções por HIV/prevenção & controle , Infecções por HIV/epidemiologia , Epidemias/prevenção & controle , Síndrome da Imunodeficiência Adquirida/prevenção & controle , Síndrome da Imunodeficiência Adquirida/epidemiologia
19.
BMC Complement Med Ther ; 24(1): 184, 2024 May 04.
Artigo em Inglês | MEDLINE | ID: mdl-38704524

RESUMO

BACKGROUND: Drawing on the extensive utilization of traditional Chinese medicine (TCM) to combat COVID-19 in Mainland China, experts designed a series of TCM anti-epidemic strategies. This study aims to understand Hong Kong CM practitioners' application of and opinions on the "Chinese Medicine Anti-epidemic Plans." METHODS: Online focus group interviews were conducted, and purposive sampling was employed to invite 22 CM practitioners to voluntarily participate in three interview sessions. The interviews were audio recorded, then transcribed verbatim. The transcripts were analyzed using template analysis. RESULTS: Three themes were derived: (1) facilitators of the "Chinese Medicine Anti-epidemic Plans," (2) barriers of the "Chinese Medicine Anti-epidemic Plans," and (3) expectations on improving the "Chinese Medicine Anti-epidemic Plans." The participants could obtain relevant information from various sources, which highlights the value of the plans for TCM medicinal cuisine and non-pharmacologic therapies and guiding junior CM practitioners, supplementing Western medicine interventions, and managing Chinese herb reserves in clinics. However, the barriers included the lack of a specialized platform for timely information release, defective plan content, limited reference value to experienced CM practitioners, and lack of applicability to Hong Kong. The expectations of the CM practitioners for improving the plans were identified based on the barriers. CONCLUSIONS: To enhance the implementation of the anti-epidemic plans, CM practitioners in Hong Kong expect to utilize a specific CM platform and refine the plans to ensure that they are realistic, focused, comprehensive, and tailored to the local context.


Assuntos
COVID-19 , Epidemias , Medicina Tradicional Chinesa , Preparação para Pandemia , Profissionais de Medicina Tradicional , Adulto , Feminino , Humanos , Masculino , COVID-19/reabilitação , Epidemias/prevenção & controle , Grupos Focais , Hong Kong , Prova Pericial
20.
PLoS One ; 19(5): e0301828, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38820356

RESUMO

COVID-19 has been a massive trade shock that has disrupted global trade, making the last few years a special phase. Even during normal times, epidemic diseases have acted as trade shocks in specific countries, albeit not to the same extent as COVID-19. For some trade shocks, the situation normalizes after the disease transmission is over; for some, it does not. Thus, specific countries can sometimes lose their original trade ratio due to trade diversion; that is, an epidemic disease could lead to unexpected industry restructuring. To examine this, based on data on 110 WHO members from 1996 to 2018, we use a fixed-effect panel model supported by the Hausman Test to empirically identify whether epidemic diseases can cause trade shocks and trade diversion. We find: First, epidemic disease can lead to negative shocks to a country's trade growth and its ratio of worldwide trade. Second, with a longer epidemic, the probability of the trade diversion effect increases. Our results hold even after considering country heterogeneity. This presents a considerable concern about the shock of COVID-19 lasting further. Many countries are not just facing the problem of temporary trade shocks, but also the challenge of trade diversions. In particular, the probability of trade diversions is increasing rapidly, especially for late-developed countries due to their lack of epidemic containment and vaccine-producing capabilities. Even middle and high income countries cannot ignore global industry chain restructuring. Forward-looking policies should be implemented in advance; it may be too late when long-term trade damage is shown.


Assuntos
COVID-19 , Comércio , Humanos , COVID-19/epidemiologia , COVID-19/prevenção & controle , COVID-19/transmissão , SARS-CoV-2 , Epidemias/prevenção & controle , Pandemias/prevenção & controle
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