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3.
JAMA Cardiol ; 8(5): 443-452, 2023 05 01.
Artigo em Inglês | MEDLINE | ID: covidwho-2264255

RESUMO

Importance: The burden of atherosclerotic cardiovascular disease (ASCVD) in the US is higher among Black and Hispanic vs White adults. Inclusion of race in guidance for statin indication may lead to decreased disparities in statin use. Objective: To evaluate prevalence of primary prevention statin use by race and ethnicity according to 10-year ASCVD risk. Design, Setting, and Participants: This serial, cross-sectional analysis performed in May 2022 used data from the National Health and Nutrition Examination Survey, a nationally representative sample of health status in the US, from 2013 to March 2020 (limited cycle due to the COVID-19 pandemic), to evaluate statin use for primary prevention of ASCVD and to estimate 10-year ASCVD risk. Participants aged 40 to 75 years without ASCVD, diabetes, low-density lipoprotein cholesterol levels 190 mg/dL or greater, and with data on medication use were included. Exposures: Self-identified race and ethnicity (Asian, Black, Hispanic, and White) and 10-year ASCVD risk category (5%-<7.5%, 7.5%-<20%, ≥20%). Main Outcomes and Measures: Prevalence of statin use, defined as identification of statin use on pill bottle review. Results: A total of 3417 participants representing 39.4 million US adults after applying sampling weights (mean [SD] age, 61.8 [8.0] years; 1289 women [weighted percentage, 37.8%] and 2128 men [weighted percentage, 62.2%]; 329 Asian [weighted percentage, 4.2%], 1032 Black [weighted percentage, 12.7%], 786 Hispanic [weighted percentage, 10.1%], and 1270 White [weighted percentage, 73.0%]) were included. Compared with White participants, statin use was lower in Black and Hispanic participants and comparable among Asian participants in the overall cohort (Asian, 25.5%; Black, 20.0%; Hispanic, 15.4%; White, 27.9%) and within ASCVD risk strata. Within each race and ethnicity group, a graded increase in statin use was observed across increasing ASCVD risk strata. Statin use was low in the highest risk stratum overall with significantly lower rates of use among Black (23.8%; prevalence ratio [PR], 0.90; 95% CI, 0.82-0.98 vs White) and Hispanic participants (23.9%; PR, 0.90; 95% CI, 0.81-0.99 vs White). Among other factors, routine health care access and health insurance were significantly associated with higher statin use in Black, Hispanic, and White adults. Prevalence of statin use did not meaningfully change over time by race and ethnicity or by ASCVD risk stratum. Conclusions and Relevance: In this study, statin use for primary prevention of ASCVD was low among all race and ethnicity groups regardless of ASCVD risk, with the lowest use occurring among Black and Hispanic adults. Improvements in access to care may promote equitable use of primary prevention statins in Black and Hispanic adults.


Assuntos
Aterosclerose , COVID-19 , Doenças Cardiovasculares , Inibidores de Hidroximetilglutaril-CoA Redutases , Adulto , Masculino , Humanos , Feminino , Pessoa de Meia-Idade , Etnicidade , Inibidores de Hidroximetilglutaril-CoA Redutases/uso terapêutico , Doenças Cardiovasculares/epidemiologia , Doenças Cardiovasculares/prevenção & controle , Doenças Cardiovasculares/tratamento farmacológico , Inquéritos Nutricionais , Prevalência , Estudos Transversais , Pandemias , COVID-19/epidemiologia , Aterosclerose/epidemiologia , Aterosclerose/prevenção & controle , Aterosclerose/tratamento farmacológico , Prevenção Primária
4.
BMJ Glob Health ; 8(2)2023 02.
Artigo em Inglês | MEDLINE | ID: covidwho-2233321

RESUMO

BACKGROUND: Respiratory syncytial virus (RSV) is the principal cause of acute lower respiratory infections (ALRI) among infants worldwide, and an important cause of morbidity, hospitalisation and mortality. While infants are universally exposed to RSV, most mortality occurs among normal term infants from low-income and middle-income countries. Breastfeeding has been suggested to have a protective effect against RSV infection. This study aims to determine the association of breastfeeding on the frequency and severity of RSV-associated ALRI among infants. METHODS: A systematic review was conducted using keywords and Medical Subject Headings on MEDLINE, PubMed, Google Scholar, EMBASE, MedRxiv and Cochrane Central Register of Controlled Trials. Full-text articles published in English from 2000 to 2021 that studied exclusively or partially breastfed infants who developed RSV-associated ALRI <12 months of age were included. Covidence software-based evidence extraction and Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocol guidelines were followed. Quality of evidence was analysed using UK National Service Framework grading and the risk-of-bias assessment using Robvis. RESULTS: Among 1368 studies screened, 217 qualified full-text review and 198 were excluded based on pre-agreed criteria. Nineteen articles published from 12 countries that included 16 787 infants from 31 countries (of which 8 middle-income) were retained for analysis. Results indicate that non-breastfeeding practices pose a significant risk for severe RSV-associated ALRI and hospitalisation. Exclusive breastfeeding for >4-6 months significantly lowered hospitalisation, length of stay, supplemental oxygen demand and admission to intensive care units. CONCLUSION: In the context of no effective or standardised treatment for established RSV-associated ALRI, available evidence suggest that breastfeeding is associated with lower frequency and severity of RSV-associated ALRI, based on observational studies of variable grades of evidence and risk-of-bias. With both exclusive and partial breastfeeding benefiting infants who develop RSV-associated ALRI, breastfeeding should be promoted globally as an adjunct primary prevention; in addition to emerging immunoprophylaxis and maternal immunisation strategies.


Assuntos
Vírus Sinciciais Respiratórios , Infecções Respiratórias , Feminino , Lactente , Humanos , Aleitamento Materno , Incidência , Infecções Respiratórias/epidemiologia , Infecções Respiratórias/prevenção & controle , Prevenção Primária
6.
Sex Health ; 19(4): 319-328, 2022 08.
Artigo em Inglês | MEDLINE | ID: covidwho-2050708

RESUMO

Sexually transmitted infections (STIs) affect hundreds of millions of people globally. The resulting impact on quality of life and the economy for health systems is huge. Specialist sexual health services (SHS) play a key role in the provision of primary prevention interventions targeted against STIs. We conducted a narrative review to explore the role of SHSs in delivering primary prevention interventions for STIs. Established interventions include education and awareness building, condom promotion, and the provision of vaccines. Nascent interventions such as the use of antibiotics as pre- and post-exposure prophylaxis are not currently recommended, but have already been adopted by some key population groups. The shift to delivering SHS through digital health technologies may help to reduce barriers to access for some individuals, but creates challenges for the delivery of primary prevention and may inadvertently increase health inequities. Intervention development will need to consider carefully these shifting models of service delivery so that existing primary prevention options are not side-lined and that new interventions reach those who can benefit most.


Assuntos
Serviços de Saúde/classificação , Infecções Sexualmente Transmissíveis/prevenção & controle , Preservativos , Infecções por HIV/epidemiologia , Infecções por HIV/prevenção & controle , Serviços de Saúde/tendências , Humanos , Prevenção Primária , Qualidade de Vida , Infecções Sexualmente Transmissíveis/epidemiologia
7.
Int J Environ Res Public Health ; 19(16)2022 08 17.
Artigo em Inglês | MEDLINE | ID: covidwho-2023661

RESUMO

Environmental factors including household crowding and inadequate washing facilities underpin recurrent streptococcal infections in childhood that cause acute rheumatic fever (ARF) and subsequent rheumatic heart disease (RHD). No community-based 'primordial'-level interventions to reduce streptococcal infection and ARF rates have been reported from Australia previously. We conducted a study at three Australian Aboriginal communities aiming to reduce infections including skin sores and sore throats, usually caused by Group A Streptococci, and ARF. Data were collected for primary care diagnoses consistent with likely or potential streptococcal infection, relating to ARF or RHD or related to environmental living conditions. Rates of these diagnoses during a one-year Baseline Phase were compared with a three-year Activity Phase. Participants were children or adults receiving penicillin prophylaxis for ARF. Aboriginal community members were trained and employed to share knowledge about ARF prevention, support reporting and repairs of faulty health-hardware including showers and provide healthcare navigation for families focusing on skin sores, sore throat and ARF. We hypothesized that infection-related diagnoses would increase through greater recognition, then decrease. We enrolled 29 participants and their families. Overall infection-related diagnosis rates increased from Baseline (mean rate per-person-year 1.69 [95% CI 1.10-2.28]) to Year One (2.12 [95% CI 1.17-3.07]) then decreased (Year Three: 0.72 [95% CI 0.29-1.15]) but this was not statistically significant (p = 0.064). Annual numbers of first-known ARF decreased, but numbers were small: there were six cases of first-known ARF during Baseline, then five, 1, 0 over the next three years respectively. There was a relationship between household occupancy and numbers (p = 0.018), but not rates (p = 0.447) of infections. This first Australian ARF primordial prevention study provides a feasible model with encouraging findings.


Assuntos
Faringite , Febre Reumática , Cardiopatia Reumática , Infecções Estreptocócicas , Adulto , Austrália/epidemiologia , Criança , Aglomeração , Características da Família , Humanos , Havaiano Nativo ou Outro Ilhéu do Pacífico , Prevenção Primária , Febre Reumática/epidemiologia , Febre Reumática/prevenção & controle , Cardiopatia Reumática/epidemiologia , Cardiopatia Reumática/prevenção & controle , Infecções Estreptocócicas/complicações
8.
BMC Pregnancy Childbirth ; 21(1): 577, 2021 Aug 22.
Artigo em Inglês | MEDLINE | ID: covidwho-1910281

RESUMO

BACKGROUND: The Covid-19 pandemic response is influencing maternal and neonatal health care services especially in developing countries. However, the indirect effects of Covid-19 on pregnancy outcomes remain unknown. The aim of the present study was to compare pregnancy outcomes before and after the beginning of the Covid-19 pandemic in Iran. METHODS: We performed a retrospective analysis of the medical records of 2,503 pregnant women with singleton pregnancies, admitted to the maternity department of a women's hospital in Tehran, Iran, during the pre-Covid-19 pandemic (February 19 to April 19, 2019) and the intra-Covid- 19 pandemic (February 19 to April 19, 2020) period. RESULTS: We included 2,503 women admitted to the hospital; 1,287 (51.4 %) were admitted before the Covid-19 lockdown and 1,216 (48.6 %) during the Covid-19 lockdown. There were no significant differences in stillbirth rates (p = 0.584) or pregnancy complications (including preeclampsia, pregnancy-induced hypertension and gestational diabetes) (p = 0.115) between pregnant women in the pre- and intra-pandemic periods. However, decreases in preterm births (p = 0.001), and low birth weight (p = 0.005) were observed in the pandemic period compared to the pre-pandemic period. No significant difference in the mode of delivery, and no maternal deaths were observed during the two time periods. CONCLUSIONS: In our study we observed a decrease in preterm births and low birth weight, no change in stillbirths, and a rise in the admission rates of mothers to the ICU during the initial Covid-19 lockdown period compared to pre-Covid-19 lockdown period. Further research will be needed to devise plan for immediate post-pandemic care and future health care crises.


Assuntos
COVID-19/epidemiologia , Transmissão Vertical de Doenças Infecciosas/prevenção & controle , Complicações Infecciosas na Gravidez/epidemiologia , Resultado da Gravidez/epidemiologia , Isolamento Social/psicologia , Feminino , Humanos , Recém-Nascido , Irã (Geográfico)/epidemiologia , Gravidez , Prevenção Primária/métodos , Índice de Gravidade de Doença
9.
BMC Pregnancy Childbirth ; 21(1): 574, 2021 Aug 21.
Artigo em Inglês | MEDLINE | ID: covidwho-1910280

RESUMO

SARS-Cov-2 (Severe Acute Respiratory Coronavirus 2) infection confers a non-negligible risk for younger pregnant women with diabetes, which is still less well investigated. This topic was recently addressed by a systematic scoping review in BMC Pregnancy and Childbirth, aiming to summarize the complex interaction between SARS-Cov-2 infection, pregnancy and diabetes. This commentary will summarize and discuss the main findings of this article and its implications for future research.


Assuntos
COVID-19/epidemiologia , Transmissão Vertical de Doenças Infecciosas/prevenção & controle , Saúde Materna/estatística & dados numéricos , Complicações Infecciosas na Gravidez/epidemiologia , Gravidez em Diabéticas/epidemiologia , Cuidado Pré-Natal/métodos , Feminino , Humanos , Recém-Nascido , Gravidez , Prevenção Primária/métodos
10.
BMC Pregnancy Childbirth ; 21(1): 573, 2021 Aug 21.
Artigo em Inglês | MEDLINE | ID: covidwho-1910279

RESUMO

BACKGROUND: Currently, we suffer from an increasing diabetes pandemic and on the other hand from the SARS-CoV-2 pandemic. Already at the beginning of the SARS-CoV-2 pandemic, it was quickly assumed that certain groups are at increased risk to suffer from a severe course of COVID-19. There are serious concerns regarding potential adverse effects on maternal, fetal, and neonatal outcomes. Diabetic pregnancies clearly need special care, but clinical implications as well as the complex interplay of diabetes and SARS-CoV-2 are currently unknown. We summarized the evidence on SARS-CoV-2 in diabetic pregnancies, including the identification of novel potential pathophysiological mechanisms and interactions as well as clinical outcomes and features, screening, and management approaches. METHODS: We carried out a systematic scoping review in MEDLINE (PubMed), EMBASE, CINAHL, Cochrane Library, and Web of Science Core Collection in September 2020. RESULTS: We found that the prognosis of pregnant women with diabetes mellitus and COVID-19 may be associated with potential underlying mechanisms such as a simplified viral uptake by ACE2, a higher basal value of pro-inflammatory cytokines, being hypoxemic as well as platelet activation, embolism, and preeclampsia. In the context of "trans-generational programming" and COVID-19, life-long consequences may be "programmed" during gestation by pro-inflammation, hypoxia, over- or under-expression of transporters and enzymes, and epigenetic modifications based on changes in the intra-uterine milieu. COVID-19 may cause new onset diabetes mellitus, and that vertical transmission from mother to baby might be possible. CONCLUSIONS: Given the challenges in clinical management, the complex interplay between COVID-19 and diabetic pregnancies, evidence-based recommendations are urgently needed. Digital medicine is a future-oriented and effective approach in the context of clinical diabetes management. We anticipate our review to be a starting point to understand and analyze mechanisms and epidemiology to most effectively treat women with SARS-COV-2 and diabetes in pregnancy.


Assuntos
COVID-19/epidemiologia , Transmissão Vertical de Doenças Infecciosas/prevenção & controle , Saúde Materna/estatística & dados numéricos , Complicações Infecciosas na Gravidez/epidemiologia , Gravidez em Diabéticas/epidemiologia , Cuidado Pré-Natal/métodos , Feminino , Humanos , Recém-Nascido , Gravidez , Prevenção Primária/métodos
11.
Am J Orthopsychiatry ; 92(5): 616-621, 2022.
Artigo em Inglês | MEDLINE | ID: covidwho-1908109

RESUMO

Child trafficking is one of the most egregious violations of children's rights and well-being. In 2014, the Global Alliance for Behavioral Health and Social Justice formed a task force to focus on the issue. After completing two comprehensive reviews and consultations with experts in the field, the task force identified the need for a coherent framework, which conceptualized the primary prevention of child trafficking, which includes children vulnerable to being trafficked and becoming traffickers. This article describes the process undertaken to develop the primary prevention framework, an innovative, aspirational plan for communities to be absent of trafficking. It describes the framework in detail, including the theories that underlie it and the principles that guide it. The framework's flexibility is evident in its application to such worldwide challenges as racism, inequities, and a pandemic. Although the full consequences of the impact of the COVID-19 pandemic on children are not yet known, this article describes certain trends, which have been identified and discusses critical lessons for applying a dynamic framework, as global disruptors will continue. The article ends with examples of how the framework could be implemented by all stakeholders in the community, to address the primary prevention of child trafficking in both the physical and the virtual world. (PsycInfo Database Record (c) 2022 APA, all rights reserved).


Assuntos
COVID-19 , Tráfico de Pessoas , COVID-19/prevenção & controle , Criança , Tráfico de Pessoas/prevenção & controle , Humanos , Pandemias , Prevenção Primária , Justiça Social
12.
J Am Heart Assoc ; 11(12): e023357, 2022 06 21.
Artigo em Inglês | MEDLINE | ID: covidwho-1891999

RESUMO

Background There is little evidence on the relationship between statin use and the risk of hospitalization attributable to COVID-19. Methods and Results The French National Healthcare Data System database was used to conduct a matched-cohort study. For each adult aged ≥40 years receiving statins for the primary prevention of cardiovascular diseases, one nonuser was randomly selected and matched for year of birth, sex, residence area, and comorbidities. The association between statin use and hospitalization for COVID-19 was examined using conditional Cox proportional hazards models, adjusted for baseline characteristics, comorbidities, and long-term medications. Its association with in-hospital death from COVID-19 was also explored. All participants were followed up from February 15, 2020, to June 15, 2020. The matching procedure generated 2 058 249 adults in the statin group and 2 058 249 in the control group, composed of 46.6% of men with a mean age of 68.7 years. Statin users had a 16% lower risk of hospitalization for COVID-19 than nonusers (adjusted hazard ratio [HR], 0.84; 95% CI, 0.81-0.88). All types of statins were significantly associated with a lower risk of hospitalization, with the adjusted HR ranging from 0.75 for fluvastatin to 0.89 for atorvastatin. Low- and moderate-intensity statins also showed a lower risk compared with nonusers (HR, 0.78 [95% CI, 0.71-0.86] and HR, 0.84 [95% CI, 0.80-0.89], respectively), whereas high-intensity statins did not (HR, 1.01; 95% CI, 0.86-1.18). We found similar results with in-hospital death from COVID-19. Conclusions Our findings support that the use of statins for primary prevention is associated with lower risks of hospitalization for COVID-19 and of in-hospital death from COVID-19.


Assuntos
COVID-19 , Doenças Cardiovasculares , Inibidores de Hidroximetilglutaril-CoA Redutases , Adulto , Idoso , Doenças Cardiovasculares/tratamento farmacológico , Doenças Cardiovasculares/epidemiologia , Doenças Cardiovasculares/prevenção & controle , Estudos de Coortes , Mortalidade Hospitalar , Hospitalização , Humanos , Inibidores de Hidroximetilglutaril-CoA Redutases/uso terapêutico , Masculino , Prevenção Primária , Estudos Retrospectivos
13.
Cochrane Database Syst Rev ; 1: CD013320, 2022 01 05.
Artigo em Inglês | MEDLINE | ID: covidwho-1838125

RESUMO

BACKGROUND: High intake of added sugar have been suggested to impact the risk for cardiovascular disease (CVD). Knowledge on the subject can contribute to preventing CVD. OBJECTIVES: To assess the effects of a high versus low-added sugar consumption for primary prevention of CVD in the general population. SEARCH METHODS: We searched Cochrane Central Register of Controlled Trials (CENTRAL) in the Cochrane Library, MEDLINE, Embase, Conference Proceedings Citation Index-Science (CPCI-S) on 2 July 2021. We also conducted a search of ClinicalTrials.gov and the WHO International Clinical Trials Registry Platform (ICTRP) Search Portal for ongoing or unpublished trials. The search was performed together with reference checking, citation searching and contact with study authors to identify additional studies. We imposed no restriction on language of publication or publication status. SELECTION CRITERIA: We included randomised controlled trials (RCTs), including cross-over trials, that compared different levels of added sugar intake. Exclusion criteria were: participants aged below 18 years; diabetes mellitus (type 1 and 2); and previous CVD. Primary outcomes were incident cardiovascular events (coronary, carotid, cerebral and peripheral arterial disease) and all-cause mortality. Secondary outcomes were changes in systolic and diastolic blood pressure, total cholesterol, LDL-cholesterol, HDL-cholesterol, triglycerides, fasting plasma glucose and adverse events (gastrointestinal symptoms and impaired dental health). DATA COLLECTION AND ANALYSIS: We used the standard methodological procedures expected by Cochrane. MAIN RESULTS: We included 21 RCTs (1110 participants completing the interventions) examining the effects of different levels of added sugar intake with a mean duration of 14 weeks. The study participants were generally described as healthy and the mean age ranged from 22 to 57 years. No studies reported on cardiovascular events or all-cause mortality. There was minimal effect of low intake of added sugar on total cholesterol levels (MD 0.11, 95% CI 0.01 to 0.21; I² = 0%; 16 studies; 763 participants; low certainty of evidence) and triglycerides (MD 0.10, 95% CI 0.03 to 0.17; I² = 3%; 14 studies; 725 participants) but no evidence of effect on LDL-cholesterol and HDL-cholesterol. There was minimal effect on diastolic blood pressure (MD 1.52, 95% CI 0.67 to 2.37; I² = 0%; 13 studies; 873 participants) and on systolic blood pressure (MD 1.44, 95% 0.08 to 2.80; I² = 27%, 14 studies; 873 participants; low certainty of evidence), but no evidence of effect on fasting plasma glucose. Only one study reported on dental health, with no events. No other trials reported adverse events (impaired dental health or gastrointestinal symptoms). All results were judged as low-quality evidence according to GRADE. The risk of bias was generally unclear, five studies were classified at an overall low risk of bias (low risk in at least four domains, not including other bias). AUTHORS' CONCLUSIONS: No trials investigating the effect of added sugar on cardiovascular events or all-cause mortality were identified in our searches. Evidence is uncertain whether low intake of added sugar has an effect on risk factors for CVD; the effect was small and the clinical relevance is, therefore, uncertain. Practical ways to achieve reductions in dietary added sugar includes following current dietary recommendations. Future trials should have longer follow-up time and report on all-cause mortality and cardiovascular events in order to clarify the effect of added sugar on these outcomes. Future trials should also aim for more direct interventions and preferably be more independent of industry funding.


Assuntos
Doenças Cardiovasculares , Adulto , Idoso , Doenças Cardiovasculares/epidemiologia , Doenças Cardiovasculares/prevenção & controle , Colesterol , Açúcares da Dieta/efeitos adversos , Humanos , Pessoa de Meia-Idade , Prevenção Primária , Açúcares , Adulto Jovem
14.
PLoS One ; 17(3): e0264237, 2022.
Artigo em Inglês | MEDLINE | ID: covidwho-1724847

RESUMO

BACKGROUND: Coronavirus disease 2019 (COVID-19) causes more than five million deaths worldwide. Pregnant women are at high risk for infection due to the physiologic change in the immune and cardiopulmonary system and also it increases the risk of severe disease, intensive care unit admission, and receive mechanical ventilation when compared with non-pregnant women. It is associated with adverse maternal and neonatal outcomes. So pregnant women need to have adhered to preventive measures to prevent COVID-19 related consequences. Therefore, this study aimed to assess adherence toCOVID-19 preventive practice and associated factors among pregnant women in Gondar city, northwest Ethiopia. METHODS: A community-based cross-sectional study was conducted from July 1st to 30th, 2021, in Gondar city. A cluster sampling technique was employed to select 678 pregnant women. Data were collected using a pre-tested, face-to-face interviewer-administered questionnaire. Data were entered into EPI DATA version 4.6 and exported to SPSS version 25 for analysis. Both bivariable and multivariable logistic regression analysis was fitted to identify associated factors. Adjusted odds ratio with a 95% confidence interval was used to report the association between covariates and the outcome variable. RESULTS: The prevalence of good adherence to COVID-19 preventive practice was 44.8% (95% CI: 41.3, 48.7). Maternal age (≤24 years) [AOR = 2.89, 95% CI: 1.37, 6.10], maternal education (secondary school) [AOR = 2.95, 95% CI: 1.58, 5.53] and (college and above) [AOR = 4.57,95% CI: 2.42, 8.62], having ANC follow up [AOR = 2.95, 95% CI: 1.35, 6.46] and adequate knowledge towards COVID-19 [AOR = 1.70, 95% CI: 1.20, 2.41] were significantly associated with good adherence to COVID-19 preventive practice. CONCLUSION: In this study, adherence towards COVID-19 preventive practice in pregnant women is low. Hence, it is important to strengthen women's awareness about COVID-19 through different media and health education. In addition, empowering women to attain ANC and special consideration should be given to women who had no formal education.


Assuntos
COVID-19/prevenção & controle , Cooperação do Paciente/estatística & dados numéricos , Prevenção Primária/estatística & dados numéricos , Adulto , Cidades , Pesquisa Participativa Baseada na Comunidade , Estudos Transversais , Escolaridade , Etiópia/epidemiologia , Feminino , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Idade Materna , Gravidez , Prevenção Primária/educação , Fatores Socioeconômicos , Inquéritos e Questionários , Adulto Jovem
15.
Int J Mol Sci ; 23(3)2022 Feb 06.
Artigo em Inglês | MEDLINE | ID: covidwho-1674673

RESUMO

The SARS-CoV-2 pandemic caused a massive health and societal crisis, although the fast development of effective vaccines reduced some of the impact. To prepare for future respiratory virus pandemics, a pan-viral prophylaxis could be used to control the initial virus outbreak in the period prior to vaccine approval. The liposomal vaccine adjuvant CAF®09b contains the TLR3 agonist polyinosinic:polycytidylic acid, which induces a type I interferon (IFN-I) response and an antiviral state in the affected tissues. When testing CAF09b liposomes as a potential pan-viral prophylaxis, we observed that intranasal administration of CAF09b liposomes to mice resulted in an influx of innate immune cells into the nose and lungs and upregulation of IFN-I-related gene expression. When CAF09b liposomes were administered prior to challenge with mouse-adapted influenza A/Puerto Rico/8/1934 virus, it protected from severe disease, although the virus was still detectable in the lungs. However, when CAF09b liposomes were administered after influenza challenge, the mice had a similar disease course to controls. In conclusion, CAF09b may be a suitable candidate as a pan-viral prophylactic treatment for epidemic viruses, but must be administered prior to virus exposure to be effective.


Assuntos
Adjuvantes de Vacinas/uso terapêutico , Vacinas contra Influenza/uso terapêutico , Influenza Humana/prevenção & controle , Infecções por Orthomyxoviridae/prevenção & controle , Desenvolvimento de Vacinas/métodos , Adjuvantes Imunológicos/administração & dosagem , Adjuvantes Imunológicos/uso terapêutico , Adjuvantes de Vacinas/administração & dosagem , Adjuvantes de Vacinas/química , Adjuvantes de Vacinas/farmacologia , Administração Intranasal , Animais , COVID-19/prevenção & controle , Vacinas contra COVID-19/síntese química , Vacinas contra COVID-19/uso terapêutico , Células Cultivadas , Embrião de Galinha , Regulação da Expressão Gênica/efeitos dos fármacos , Humanos , Vacinas contra Influenza/administração & dosagem , Vacinas contra Influenza/química , Vacinas contra Influenza/farmacologia , Interferon Tipo I/genética , Lipossomos/química , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Endogâmicos C57BL , Prevenção Primária/métodos , SARS-CoV-2/imunologia
16.
Nat Commun ; 13(1): 554, 2022 01 27.
Artigo em Inglês | MEDLINE | ID: covidwho-1655581

RESUMO

We aim to identify those measures that effectively control the spread of SARS-CoV-2 in Austrian schools. Using cluster tracing data we calibrate an agent-based epidemiological model and consider situations where the B1.617.2 (delta) virus strain is dominant and parts of the population are vaccinated to quantify the impact of non-pharmaceutical interventions (NPIs) such as room ventilation, reduction of class size, wearing of masks during lessons, vaccinations, and school entry testing by SARS-CoV2-antigen tests. In the data we find that 40% of all clusters involved no more than two cases, and 3% of the clusters only had more than 20 cases. The model shows that combinations of NPIs together with vaccinations are necessary to allow for a controlled opening of schools under sustained community transmission of the SARS-CoV-2 delta variant. For plausible vaccination rates, primary (secondary) schools require a combination of at least two (three) of the above NPIs.


Assuntos
COVID-19/prevenção & controle , COVID-19/transmissão , Prevenção Primária/métodos , Vacinação/estatística & dados numéricos , Adolescente , Áustria/epidemiologia , COVID-19/epidemiologia , Vacinas contra COVID-19/imunologia , Criança , Busca de Comunicante , Hotspot de Doença , Humanos , Máscaras , Quarentena , SARS-CoV-2 , Instituições Acadêmicas/estatística & dados numéricos , Ventilação
17.
PLoS Negl Trop Dis ; 16(1): e0010048, 2022 01.
Artigo em Inglês | MEDLINE | ID: covidwho-1606114

RESUMO

BACKGROUND: The first community transmission of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Delta variant of concern (VOC) in Guangzhou, China occurred between May and June 2021. Herein, we describe the epidemiological characteristics of this outbreak and evaluate the implemented containment measures against this outbreak. METHODOLOGY/PRINCIPAL FINDINGS: Guangzhou Center for Disease Control and Prevention provided the data on SARS-CoV-2 infections reported between 21 May and 24 June 2021. We estimated the incubation period distribution by fitting a gamma distribution to the data, while the serial interval distribution was estimated by fitting a normal distribution. The instantaneous effective reproductive number (Rt) was estimated to reflect the transmissibility of SARS-CoV-2. Clinical severity was compared for cases with different vaccination statuses using an ordinal regression model after controlling for age. Of the reported local cases, 7/153 (4.6%) were asymptomatic. The median incubation period was 6.02 (95% confidence interval [CI]: 5.42-6.71) days and the means of serial intervals decreased from 5.19 (95% CI: 4.29-6.11) to 3.78 (95% CI: 2.74-4.81) days. The incubation period increased with age (P<0.001). A hierarchical prevention and control strategy against COVID-19 was implemented in Guangzhou, with Rt decreasing from 6.83 (95% credible interval [CrI]: 3.98-10.44) for the 7-day time window ending on 27 May 2021 to below 1 for the time window ending on 8 June and thereafter. Individuals with partial or full vaccination schedules with BBIBP-CorV or CoronaVac accounted for 15.3% of the COVID-19 cases. Clinical symptoms were milder in partially or fully vaccinated cases than in unvaccinated cases (odds ratio [OR] = 0.26 [95% CI: 0.07-0.94]). CONCLUSIONS/SIGNIFICANCE: The hierarchical prevention and control strategy against COVID-19 in Guangzhou was timely and effective. Authorised inactivated vaccines are likely to contribute to reducing the probability of developing severe disease. Our findings have important implications for the containment of COVID-19.


Assuntos
Vacinas contra COVID-19/uso terapêutico , COVID-19/epidemiologia , COVID-19/prevenção & controle , Controle de Doenças Transmissíveis/métodos , SARS-CoV-2/isolamento & purificação , Adulto , Idoso , Número Básico de Reprodução , COVID-19/transmissão , China/epidemiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prevenção Primária/métodos , Índice de Gravidade de Doença , Vacinação/estatística & dados numéricos , Adulto Jovem
20.
J Med Virol ; 93(12): 6496-6505, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: covidwho-1544293

RESUMO

The COVID-19 epidemic is not only a medical issue but also a sophisticated social problem. We propose a network dynamics model of epidemic transmission introducing a heterogeneous control factor. The proposed model applied the classical susceptible- exposed-infectious-recovered model to the network based on effective distance and was modified by introducing a heterogeneous control factor with temporal and spatial characteristics. International aviation data were approximately used to estimate the flux fraction matrix, and the effective distance was calculated. Through parameter estimation and simulation, the theoretical values of the modified model fit well with practical values. By adjusting the parameters and observing the change of the results, we found that the modified model is more in line with the actual needs and has higher credibility in the comprehensive analysis. The assessment shows that the number of confirmed cases worldwide will reach about 20 million optimistically. In severe cases, the peak value will exceed 80 million, and the late stage of the epidemic shows a long tail shape, lasting more than one and a half years. The effective way to control the global epidemic is to strengthen international cooperation and to impose international travel restrictions and other measures.


Assuntos
COVID-19/prevenção & controle , COVID-19/transmissão , Controle de Doenças Transmissíveis/métodos , Prevenção Primária/métodos , Simulação por Computador , Humanos , Distanciamento Físico , Quarentena , SARS-CoV-2
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