The effects of COVID-19 on the water sector

The COVID-19 pandemic affected public health, economy, social life, and the environment. It infected and killed millions of people around the world. Most of the recent literature has focused on the medications to combat this virus, including antivirals and vaccines, but studies about its effect on the environment are still rare, particularly on the water sector. Most of the studies concentrate on the effect of water availability on COVID-19, the effect of the used medications on the water, and the probability of transmission of SARS-CoV-2 through water. Herein, we have summarized the effects of COVID-19 on the water sector from many perspectives. We show different methods to detect the effect of the pandemic on water and also methods to investigate the presence of the virus or its RNA in the water. We also show the different effects of its presence in the wastewater, the probability of transmission, the detection of different variants, and the prediction of new waves. We also show the disadvantages and advantages of the pandemic in the water sector. We finally suggest some recommendations to face this pandemic and the future pandemics for the governments and water policymakers, water treatment plants, general population, and researchers. The aim of this review is to show the different aspects of the pandemic in order to give a general idea about what must be done in order to minimize its effect and any probable pandemic in the future.

Declaration of Cuernavaca

The National Public Health Institutes (NPHI), members of the Latin American Regional Network of the International Association of National Institutes of Public Health, met face to face at the headquarters of the National Institute of Public Health of Mexico, in the City of Cuernavaca, from October 5 to 7, 2022, with the participation of the directors or their representatives of the NPHIs of Bolivia, Brazil, Colombia, Costa Rica, El Salvador, Mexico, Peru and Suriname and representatives of the South American Sub regional Program (SAM), and the Central American Sub regional Program (CAM) of the Pan American Health Organization (PAHO), the Organization of the Amazon Cooperation Treaty (OTCA), the Andean Health Agency/Hipolito Unanue Agreement (ORAS/CONHU) and the Central American Integration System (SICA/COMISCA), analyzing the role of the NPHI in combating health inequities;in confronting the global climate and environmental crisis;combating hunger, food insecurity and malnutrition;successes and challenges in responding to the Covid-19 pandemic;strengthening and continuous improvement of integrated disease surveillance and preparedness for health emergencies;as well as the various existing regional and sub-regional health cooperation programs, noticing that: 1. In the current scenario, the dominating development model is a generator of growing social inequalities, which determine serious inequities in the health conditions of our peoples. 2. Likewise, the current model of production and consumption, adopted at the global level, has increased hunger, food insecurity and malnutrition that possibly constitute nowadays the main health problem in our region. 3. The environmental crisis, which is also a product of the current global development model, has a significant impact on human and animal health and the interaction between both. 4. The NPHIs have played a role of major relevance in confronting the Covid-19 pandemic, not fully applying, however, their full potential for research and for proposing national plans for the disease control. 5. Health surveillance systems, in most of our countries, suffer from significant fragmentation between various sectors and within the health sector itself, implying, in any case, reactive actions that do not allow for anticipating the emergence of new pathologies or health emergencies. 6. The various regional and sub regional cooperation agencies and programs offer an enormous capacity for synergies and mutual cooperation.

Air pollution with pm10 for the municipality of Burgas and the monthly cases of disease with COVID 19, 2021

An important environmental problem for the Municipality of Burgas is the relatively high levels of PM10 pollution. Particulate matter PM10 is defined as the fraction of particles with an aerodynamic diameter smaller than 10 pm. The article provides statistical processing and evaluation of daily data on the concentration of PM10 in the air by quarters fix Burgas, 2021. A histogram of the frequency distribution of concentrations by quarters was prepared. A regression model for calculating the monthly concentrations in the atmospheric air is derived The tests and inspections performed show that the performed modelling is suitable for evaluation, analysis and forecast. Air pollution harms human health and the environment. Exposure ID air pollution is associated with a wide range of acute and chronic health effects, ranging from irritating effects to death From the end of 2019 until now in the world, Europe and in particular Bulgaria is raging a dangerous respiratory disease known as COVD19. The average monthly new cases of COVD19 for Burgas were assessed, as well as the respective maximum and minimum monthly values. A qualitative assessment of the relationship between the monthly concentrations of PM10 and the incidence of COVID19 was made.

Ethical duties in the preparation

The experience of the COVID-19 pandemic and the horizon of expectations in relation to climate change reminds us that it is a collective responsibility to anticipate to the best of our ability and knowledge the risks of foreseeable disasters and their potential impacts on vulnerable communities. The article will examine the meaning and status of moral duties regarding disaster preparedness by adopting a disaster ethics approach which draws on the interrelationship of bioethics with public health ethics and looks at the full cycle of disaster management and the corresponding cycle of protection of victims and professionals. After discussing some normative controversies accompanying well-known classifications of disasters and characterizing the ethical turn to preparedness in disaster management, it will be argued that preparedness duties include obligations relating to planning, anticipation, and prevention of disasters and that they are derivative and positive duties involving a series of prospective, shared and institutionally mediated responsibilities.

COVID-19, black swans and the anticipation of health disasters: future problems and the future as a problem in public health ethics

The COVID-19 pandemic has recalled the importance of prevention and preparedness for highly disastrous events in community health. Several emerging phenomena pose prospective threats to public health. However, the largely future-oriented character of problems, for instance, such as antibiotic resistance, the impact of climate change on health, or the bioengineering of pathogens generates difficulties of analysis. What are the ethical and epistemological challenges raised by future public health problems? How should the moral problems of potentially catastrophic future scenarios be addressed? This article argues in favour of adopting anticipatory ethical approaches from public health ethics. First, it will be argued that addressing these future problems requires reflection on the future as an ethical and epistemic problem. Second, the characteristics of the emerging anticipatory ethics in the fields of ethics of technology and bioethics will be clarified. Third, the application of foresight and anticipatory methodologies in public health ethics debates will be defended. Finally, some reflections will be offered to strengthen anticipatory normative analyses to prevent and address in advance the adverse effects of future health crises.

Managing emerging pathogen risks in recycled water

The COVID-19 pandemic raised the public profile of wastewater-based infectious disease monitoring. General media coverage about wastewater detection of SARS-CoV-2 (the COVID-19 coronavirus) increased community awareness of the potential use of wastewater for the detection and surveillance of emerging diseases and also heightened recognition of the potential for wastewater to harbour and convey a variety of pathogens. This has also generated questions about the potential public health impacts of emerging pathogens, such as SARS-CoV-2 and mpox, in sewage and recycled water. To ensure water security in an era of climate change, water recycling is increasingly important in Australia and other water-stressed nations and managing disease risks in integrated water management is thus of critical importance. This paper demonstrates the existing risk management provisions for recycled water and explores potential issues posed by novel and emerging pathogens. First, a synopsis of some key emerging and re-emerging human pathogens is presented and the risks associated with these pathogens in the context of recycled water provision is considered. Then, an overview of the engineered treatment systems and regulatory framework used to manage these emerging risks in Australia is presented, together with a discusion of how emerging pathogen risks can be managed to ensure safe recycled water supply now and into the future.

Fostering landscape immunity to protect human health: a science-based rationale for shifting conservation policy paradigms

Anthropogenic land use change is a major driver of zoonotic pathogen spillover from wildlife to humans. According to the land use-induced spillover model, land use change alters environmental conditions that in turn alter the dynamics between zoonotic pathogens and their wildlife hosts. Thus, in response to the global spread of the SARS-CoV-2 virus (the agent of COVID-19 disease), there have been renewed calls for landscape conservation as a disease preventive measure, including by the G7 Ministers responsible for Climate and the Environment. Landscape immunity, as a new construct, points to four paradigm shifts the world must favor to effectively mitigate pandemic risks. We provide a landscape immunity primer for policy makers and make the case for "world views" that place Homo sapiens within ecological systems, regard human health as an ecological service, prioritize investments in prevention, and apply ecological restoration to human health goals. Crisis is a conversation starter for reimagining and recommitting ourselves to what is most vital and generative. We urge world leaders to make the move to a nature-positive world.

Preventive measures for managing Legionella in drinking water systems during epidemics

This paper describes and summarizes the strategies and measures that should be applied in Croatia to prevent Legionella contamination in drinking water systems in buildings during the COVID-19 epidemic. Legionella colonisation in drinking water installations increases the risk of infection for humans and it is important to point out that this public health problem is even greater during other epidemics. Legionella can cause very severe types of pneumonia called Legionnaires' disease and less serious illness Pontiac fever. Therefore, Croatia will implement the new EU Directive 2020/2184 on the quality of water intended for human consumption into its legislation, which for the first time includes an obligation to assess the risk of Legionella. This should help reduce the health risk or complications of respiratory infections (severe pneumonia) and mortality during other epidemics (COVID-19 and similar).

Impact of COVID-19 lockdown on particulate matter (PM2.5) concentration in Kathmandu, Nepal

This paper reports a study on the statistics for particulate matter pollution (PM2.5) and the COVID-19 lockdown in the Kathmandu valley. The PM2.5 decreased during the COVID-19 pandemic lockdown periods 2020 compared to the average value of the previous three years (2017, 2018, and 2019). Further, analysis of active fire and air mass trajectory for April and May in 2019 and 2020 shows that the particulate matter trend associated with Kathmandu is not directly influenced by the long-range transport of wind carrying aerosols from the active fire regions. Statistical tests indicate a reduction of particulate matter pollution during the period.

Risk assessment on air environment control in ship negative pressure ward

OBJECTIVE: To explore the air environment control in ship negative pressure ward and conduct the risk assessment. METHODS: STARCCM+ simulation software was employed to simulate the air environment in the negative pressure ward of ships, and the impact of ventilation volume, non-equilibrium pressure difference and open/close door disturbance on the flow of polluted gas in the ward and the pressure control between compartments was observed. RESULTS: It was found that the pressure gradient and airflow direction of adjacent cabins were basically the same under different ventilation conditions;the pressure fluctuation of the medical corridor had the greatest impact on the buffer room, and when the negative pressure fluctuated higher than the design value, the pressure difference between the buffer room and the negative pressure ward was lower than the design requirement of 5 Pa;when the cabin door was opened from the buffer room to the corridor, that was, when the cabin door was opened to an area with low negative pressure, a low pressure area appears in the buffer room, and the polluted air flowed from the corridor to the buffer room. Finally, the risk of airborne infection was assessed by using the Wells-Riley model, doubling the amount of ventilation reduced the probability of transmission of SARS-CoV-2 infection by about 100%. The results showed that the ventilation volume had little effect on the pressure control, but it wound affect the probability of transmission of viral infection;the pressure fluctuation in a certain compartment would affect the pressure in other areas, so that the pressure control between the compartments did not meet the design requirements, opening the hatch door to the area with low negative pressure could reduce the risk of virus transmission. CONCLUSION: The research provides guidance for the air environment control in the ship's negative pressure isolation ward so as to prevent the spread of infectious diseases in the ship.

Real-life toxicants as an emerging challenge in the rehabilitation of COVID-19 survivors

Awareness of COVID-19 infection, as a public crisis, makes an emergency condition for survivors. Regarding the importance of early rehabilitation, we should pay particular attention to the potential risk of real-life toxicants in COVID-19 survivors. The adverse effects underlying COVID-19 infection lead to persistent sequelae in survivors. In addition, complete rehabilitation is challenging in seriously-ill patients due to cytokine storm severity, inflammation, oxidative stress, and cell death contributing to multi-organ damage. Different foods, environmental/occupational pollutants, and unhealthy lifestyles are real-life examples of toxicants that can pose redox imbalance and oxidative damage to the biological system. The key concept is that survived patients with persistent tissue damage, low-grade inflammation, oxidative stress, and fibrosis are susceptible to real-life toxic stressors, which have the potential for oxidative stress. Moreover, fibrosis are susceptible to toxic stressors, which can induce harmful effects by promoting oxidative stress and pro-inflammatory components. This paper attempted to elucidate a vital toxicological concept in which the existing sequelae of COVID-19 survivors increase the potential risk of real-life toxicants and to propose a practical strategic approach to reduce toxicant exposure.

Current status of management of medical waste in medical institutions of Chongqing

OBJECTIVE: To understand the status of generation and management of medical waste in medical institutions of Chongqing. METHODS: By means of onsite investigation and questionnaire survey, the generation categories and current status of management of medical waste in 50 medical institutions were investigated from Oct 2021 to Apr 2022 the existing limitations and prominent problems in the whole-process management of medical waste were identified so as to enable the safe disposal of medical waste based on laws and regulations. RESULTS: The average pollutants generation coefficient of medical waste was 0.22-0.72 kg/bed.day among all the grades of hospitals, the average pollutant generation coefficient of medical waste was 0.28-2.30 kg/10 people among grass-root medical institutions. The management of medical waste was more standardized in tertiary hospitals. There were a variety of problems in management of medical waste in clinics and village clinics, such as nonstandard classification of medical waste, unreasonable site selection for temporary storage of medical waste, unsatisfactory transportation means and untimely collection and transportation of medical waste. The problems of chemical, pharmaceutical and pathological medical waste were more prominent. The costs of disposal of medical waste were not strictly implemented in accordance with standards. The packaging, storage, loading, handover and disinfection of COVID-19 medical waste have been carried out in accordance with regulations. CONCLUSION: It is necessary to further standardize the management of medical waste, explore and formulate the collection and transportation modes of medical waste in primary medical institutions, intensify the supervision of classification, collection, storage, transportation and disposal of medical waste, optimize and upgrade the medical waste management information system, and encourage subsidies for the disposal of medical waste in Chongqing medical waste disposal enterprises during the COVID-19 period.

Analysis of epidemic characteristics and related factors of norovirus in diarrhea patients in Guangxi, 2015-2020

To analyze the epidemiological characteristics and related factors of norovirus in Guangxi from 2015 to 2020, and to provide scientific recommendations for norovirus prevention and control. Methods The foodborne diseases surveillance data were collected from 11 sentinel hospitals through the National Foodborne Disease Monitoring and Reporting System from 2015 to 2020. R software with version 4.0.3 was used for descriptive and statistical analysis, including epidemic curve, chi-square test, and trend chi-square and so on. Logistic regression was used to analyze norovirus-related factors, OR values and 95% confidence intervals were calculated respectively with the statistical test level of P < 0.05. Results There were 1 008 norovirus cases detected, with a detection rate of 12.75% (1 008/7 903). Children with age less than 5 years (OR=1.43, 95%CI: 1.13-1.82) and patients at age 20-45 (OR=1.45, 95%CI: 1.13-1.87) were high risk population. The detection rate was higher in autumn (OR=1.29, 95%CI: 1.08-1.53) but lower in summer (OR=0.67, 95%CI: 0.55-0.80). In addition, the tourist area (Guilin City) presented a higher detection rate than other areas (OR=1.41, 95%CI: 1.10-1.80). Aquatic products (OR=1.40, 95%CI: 1.03-1.91), meat and dairy products (OR=1.31, 95%CI: 1.06-1.61) were high-risk foods for norovirus infection. The prevention and control policies of COVID-19 can reduce the possibility of norovirus by 61% (OR=0.39, 95%CI: 0.31-0.49) showed a declining trend (Trend X2=85.33, P < 0.001). In addition, prolonged visit time can lead to 19%-23% decrease in the detection rate of norovirus (OR24-48 hours=0.81, 95%CI: 0.70-0.95;OR>48 hours=0.77, 95%CI: 0.63-0.93). Conclusions The epidemic of norovirus presented seasonal and regional distribution in Guangxi with a declining detection rate trend in diarrhea patients during recent 6 years. Young children were high-risk population in infection norovirus. The intake of seafood can increase the risk of norovirus infection. The prevention and control policies of COVID-19 can sharply decrease the possibility of infection norovirus. The monitoring of key foods such as seafood should be strengthened, and the early screening of suspected cases should be taken. The norovirus monitoring should be improved to ensure the health of the population.

Racial disparities in air pollution burden and COVID-19 deaths in Louisiana, USA, in the context of long-term changes in fine particulate pollution. (Special Issue: Disparities during times of a pandemic and epidemic.)

Black Americans in Louisiana are disproportionately dying from COVID-19, and environmental disparities may be contributing to this injustice. While Black communities in Louisiana's industrialized regions (e.g., Cancer Alley, Calcasieu Parish) have been overburdened with pollution for decades, this disparity has not been evaluated by using recent data. Here, we explore statewide relationships among air pollution burden, race, COVID-19 death rates, and other health/socioeconomic factors. Measures of pollution burden included satellite-derived particulate matter (PM2.5) concentrations and health risks from toxic air pollution (i.e., respiratory hazard [RH] and immunological hazard [IH], estimated by the Environmental Protection Agency). In addition, we evaluate changes in emissions and ambient concentrations of fine PM2.5 in Louisiana over the past few decades. Our overall goal was to better understand Louisiana's burden of air pollution in the context of COVID-19. By all measures, a higher burden of air pollution was associated with larger percentages of Black residents and increased unemployment across Louisiana census tracts. Across parishes, higher COVID-19 death rates were associated with increased RH and IH and larger percentages of Black residents. These associations were not driven by diabetes, obesity, smoking, age, or poverty. Industrial sources comprised more of Louisiana's PM2.5 in 2017 versus 1990, as vehicle contributions declined 75% whereas industrial emissions remained about the same overall (despite variation in the interim). Ambient concentrations of PM2.5 decreased statewide from 2000 to 2015, but subsequently increased in south Louisiana, concurrent with an upward trend in industrial emissions. Our findings highlight the critical need to address Louisiana's pollution disparities and to recognize air pollution exposure as a risk factor for COVID-19.

Does air quality influence the spread of the SARS - Cov2 in metropolitan cities? - a case study from urban India

COVID 19 pandemic has gradually established itself as the worst pandemic in the last hundred years around the world after initial outbreak in China, including India. To prevent the spread of the infection the Government implemented lockdown measure initially from 24th March to 14th April, 2020 which was later extended to 3rd May, 2020. This lockdown imposed restrictions in human activities, vehicular movements and industrial functioning;resulting in reduced pollution level in the cities. This study was initiated with the objective to identify the change in the air quality of seven megacities in India and to determine any correlation between the active COVID cases with the air quality parameters. Air quality dataset of the most common parameters (PM2.5, PM10, SO2, NO2, NH3, CO and Ozone) along with air quality index for 70 stations of seven megacities (Delhi, Mumbai, Kolkata, Bengaluru, Hyderabad, Chennai and Chandigarh) were analysed. Comparison was made between AQI of pre lockdown and during lockdown periods. The results obtained indicate sufficient improvement in air quality during the period of the lockdown. For the next part of the study active COVID cases during the lockdown were compared to the air quality change of that period. A significant correlation between active COVID case and change in the air quality was observed for Delhi and Kolkata with 0.51 and 0.64 R2 values respectively. A positive correlation was also observed between air pollutant parameters and incidents of COVID cases in this study. Thus from the analysis it was identified that air quality index improved considerably as a result of the nationwide lockdown however, there was no significant impact of this improvement on the infection rate of the prevailing pandemic.

Significant effect of COVID-19 induced lockdown on air quality of the Indian metropolitan city Kolkata using air quality index and health air quality index

The lockdown, commencing in India from March 23, 2020 to control the escalation of Covid-19 cases, exhibited a positive impact on the air quality. The study attempts to assess the outcome of lockdown on the air quality of Kolkata, India followed by the comparison of six priority pollutants during pre-lockdown, lockdown, and unlock phases. Averaged concentrations of PM10 (72%), PM2.5 (73%), NOx (84%), SO2 (48%), and CO (61%) showed reduction throughout lockdown in comparison with pre-lockdown phase, although no significant reduction was observed in ground-level Ozone. Unlock Phases I and II showed similar concentrations of the pollutants as that in the lockdown period whereas, in unlock Phase-III, the air quality became comparable to that before lockdown. Statistical analysis confirmed that the reduction in air pollution is attributed to atmospheric factors. PCA analysis established significant positive correlation between particulate matters, CO, SO2, and NOx;however, no significant correlation was observed between NOx and O3. January and December showed the highest load of most of the pollutants. Health risk was evaluated by calculating the Relative risk and Health Air Quality Index, which showed maximum health risk during the pre-lockdown and minimum during lockdown and unlock Phase-II with the highest contributor being PM10. The study outcome manifests a reduction in environmental pollution as a result of controlled anthropogenic activities.

Special Issue: Mutagenic factors in the environment impacting human and animal health. (Special Issue: Mutagenic factors in the environment impacting human and animal health.)

This special issue includes 15 articles that discuss the mutagenic effect of tobacco smoke on male fertility;environmental and occupational exposure of metals and female reproductive health;free radical biology in neurological manifestations;paternal factors in recurrent pregnancy loss;mechanical dependency of the SARS-CoV-2 virus and the renin-angiotensin-aldosterone (RAAS) axis;a perspective review on medicinal plant resources for their antimutagenic potentials;asystematic review and meta-analysis of the impacts of glyphosate on the reproductive hormones;impact of ginseng on neurotoxicity induced by cisplatin in rats.

The impact of climate change on maternal and child health

It can be argued that there are three colliding pandemics that are currently affecting the planet and its people: COVID-19, global inequities and climate change. Regrettably, these are all the result of human action or inaction and are preventable. The United Nations Conference of the Parties (COP26), held in November 2021 in Glasgow, addressed some of these issues.1 Prince Charles called this meeting the 'last chance saloon to save the planet.' The main objective of COP26 was to reduce global heating and limit global warming to the target maximum temperature of 1.5-degree Celsius above pre-industrial levels. According to the National Aeronautics and Space Administration (NASA), since the late 19th century, the earth surface temperature rose by 1.18 degrees Celsius, caused by increased carbon dioxide and other emissions into the atmosphere, with the years 2016 and 2020 being tied as the warmest years on record.2 However, many, including a group of scientists called 'Scientist Rebellion' were not convinced that COP26 would make any difference to the warming of the planet.3 President of COP26, Alok Sharma admitted that the objective of the conference was not reached but remained cautiously optimistic: "We can now say with credibility that we have kept 1.5 degrees alive. But its pulse is weak and it will only survive if we keep our promises and translate commitments into rapid action".

Coronavirus disease 2019 (COVID-19) in Cconakry, Republic of Guinea: analysis and relationship with meteorological factors

The coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), dates back to December 29, 2019, in Wuhan, China. It quickly spreads like wildfire to all continents in the following months. In Guinea, the first case of COVID-19 and death were all reported respectively on March 12 and April 16, 2020. Since then, several studies have found a relationship between certain environmental conditions such as the meteorological factors to have the potential of contributing to the spread of the virus. Thus, this study aims at examining the extent to which observed meteorological factors might have contributed to the spread of the coronavirus disease 2019 (COVID-19) cases in Conakry, from March 1 to May 31, 2020. Meteorological factors such as temperature (Tmin, Tmean and Tmax) and relative humidity (RHmin, RHmean and RHmax) were analyzed together with the data on the COVID-19. The dynamic of the COVID-19 in Guinea was analyzed along with that of some west African countries. The analysis on the dynamic of the COVID-19 pandemic in West Africa indicated Guinea as one of the most affected countries by the pandemic after Nigeria and Ghana. The study found that in general an increase in the temperature is linked to a decline in the COVID-19 number of cases and deaths, while an increase in the humidity is positively correlated to the number of cases and deaths. Nevertheless, from this study it was also observed that low temperature, mild diurnal temperature and high humidity are likely to favor its transmission. The study therefore, recommends that habitations and hospital rooms should be kept in relatively low humidity and relatively higher temperature to minimize the spread of the (SARS-CoV-2).

Valuing the mental health benefits of woodlands

During the COVID-19 pandemic, the prevalence of mental illness has increased. Access to trees, woods, forests, and other natural environments including urban parks and green spaces has become even more important for individuals to support and maintain their wellbeing. This new research is the first of its kind to value the mental health benefits associated with the UK's woodlands. The values are based on the role of woodland in alleviating mental illnesses, resulting in reduced costs to the NHS and employers. The annual mental health benefits associated with visits to the UK's woodlands are estimated to be Pound Sterling185 million. Country-level values based on population size are given in the table below. This research is expected to be of use to policy makers in making the case for continued investment in and expansion of the UK's woodlands and treescapes, and the provision of public access to ensure people reap the benefits of those woodlands.