BACKGROUND: In order to protect public health during the outbreaks of infectious diseases including the pandemic COVID-19, provision of Water, Sanitation, and Hygiene (WASH) services is important. The challenges of inaccessible WASH services along with the pandemic COVID-19 in low-income countries can lead to a devastating problem.
METHOD: A systematic search of published articles was identified using PubMed, Web of Science, and Google Scholar, on relevant studies of COVID-19 and WASH services. Published articles were identified using abstracts and titles of the articles, followed by assessed for eligibility, and screening of the full text reports of relevant studies.
RESULTS: Electronic database search identified 798 articles from which 28 full text articles were included in the systematic review. A lack of access to WASH services in households, schools, health care facilities, and other public spaces were the main identified COVID-19 related public health risks. A lack of adequate data and financial shortages were the challenges for mitigating the problems of COVI-19 and WASH services.
CONCLUSION: This systematical review identified the impacts and challenges of COVID-19 in the provision of WASH services. The results implied that COVID-19 has significant impacts on WASH services that can affect the health of the public. Therefore, strengthening and ensuring access to WASH services are important for preventing COVID-19 and realizing human rights. Community engagement also can be used to support for prevention and control of COVID-19. Countries need to be expand their investment in WASH services as an important mechanism for mitigating COVID-19.
Coronavirus is an acute respiratory disease, which was emerged at the end of 2019. The World Health Organization’s (WHO) declared the emerging Corona Virus Disease-2019 (COVID-19) as a public health emergency of global concern at the end of January 2020, and on 11th March declared it as a global pandemic. Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is the main cause for COVID-19.1 It has already been distributed in 223 countries and territories with greater than 134 million confirmed cases and over 2 million deaths globally have been reported at the beginning of April 2021.2
Current evidences suggests that COVID-19 is mainly transmitted through respiratory droplets passed either directly when close unprotected contact between an infected and a susceptible individual or indirectly through contaminated hands touching the mucosa of the eyes, mouth, or nose. The virus may also transfer from one surface to another via contaminated hands, which facilitates indirect transmission route as stated in Figure 1 below.3–5 Due to this, WHO recommends good hygiene practice, keeping a physical distance, wearing masks, and avoiding crowds are considered to be public health measures for preventing infection with COVID-19 in community, schools, Health Care Facilities (HCF), and other public spaces.6,7 To maintain good hygienic condition, it requires access to safe water, hand washing facility with soap, and hand washing knowledge and practice.8,9
Water, sanitation, and hygiene interventions and practices are crucial in the prevention of COVID-19.10,11 Basic hygiene interventions such as Hand Washing with Water and Soap (HWWS) is the most simple and effective means of barrier for the transmission of infectious diseases.10,12 For many low income countries, however weaknesses in the Water, Sanitation, and Hygiene (WASH) organization put millions of lives at higher risk to COVID-19.13
According to WHO, at the end of February 2021, at least 7 different vaccines have been rolled out in countries. Vulnerable populations like those with underlying medical conditions in all countries were the first priority for vaccination.9 Due to limited supply of COVID-19 vaccine, vaccination only will not be sufficient to prevent community level transmission. Public health and social measures (ie, using face-masks and physical distance) should continue to be used. Before, during, and after vaccination, it is recommended to continue following standard precautions for Infection Prevention and Control (IPC).14
The pandemic COVID-19 poses undeniable challenges to global public health in the 21st century. It has socioeconomic, public health, and political consequences, according to the WHO.1 Therefore, the aim of this study is to compressively review COVID-19 pandemic and WASH services including its impacts, challenges, and mitigation strategies.
Search approach and data extraction
This review was conducted following the guidelines of Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA).15 A systematic search of articles was conducted using PubMed, Web of Science, and Google Scholar. Published articles were identified using abstracts and titles of the articles, followed by articles assessed for eligibility and screening of the full text reports of relevant studies as shown in Figure 2 below. The inclusion criteria for this review were published articles written in English language, studies conducted in COVID-19 and WASH, and accessed full-text report. The exclusion criteria were lack of relevant information, duplicated articles, and articles with no full text and abstracts.
The search strategy was used a combination of keywords and Boolean functions; “COVID-19” OR “WASH” OR “Hygiene” OR “Sanitation” OR “Water” OR “Impacts” OR “Challenges” AND “Strategies.” Moreover, a direct Google search was also conducted. Finally, reference lists cited by each eligible article were assessed to identify additional articles. To manage the citation, an endnote X7 version citation manager software was used.
Method quality assessment
Two independent reviewers (BD and TT) independently extracted data using the criteria in the data extraction sheet. Inconsistent data between the 2 reviewers was managed by the involvement of a third reviewer and discussed together. After data extraction, the findings were grouped together into 3 main thematic areas, “COVID-19 and WASH,” “impacts,” and “Challenges.” Finally, data was presented using texts. The quality of the study was assured using a predefined data extraction form. In addition, the review process was conducted according to the guidelines of PRISMA.
Characteristics of the search process
The search strategy identified 798 articles as of 21 April 2021. After duplicated articles were removed, 155 articles were obtained. Following an assessment based on abstracts and titles, 67 articles were refined for further evaluation. After full-texts assessed for relevant data and information, 28 articles were assessed for eligibility. At the end, 28 articles were included in the systematic review (Figure 2).
COVID-19 and WASH
Adequate WASH services are critical in protecting against infectious diseases such as COVID-19.16,17 Currently, many vulnerable populations are lacking access to WASH services.18,19 The COVID-19 along with inadequate WASH services can lead to a devastating situation. Hand hygiene was the most simple and effective for COVID-19 prevention. However, in many low-income countries, WASH sectors were under funded and least prioritized.17,19,20 In communities, schools, HCF, and other public spaces, the presence of adequate WASH services and facilities is rare.19,21,22
Impacts of COVID-19 on provision of WASH services
COVID-19 poses a significant impact on sustainability and continuity of WASH services.21,23 The global pandemic COVID-19 causes socioeconomic and health service impacts.1 Developing countries with humanitarian crises and vulnerable populations are significantly affected by COVID-19. It poses also additional challenges to HCF due to waste management, because facilities produce more waste than usual.21,22
Challenges to provision of WASH services
In HCF, lack of Personal Protective Equipment (PPE) and inadequate WASH services can lead to a severe situation for COVID-19 transmission.11,24,25 Lack of adequate data and financial shortage in communities and public facilities were a challenges to ensure and provide access to WASH services.20,26,27
COVID-19 and WASH
In order to protect public health during the outbreaks of infectious diseases including the pandemic COVID-19, provision of safe water, improved sanitation, and good hygienic living and environmental conditions are essential.16,17 However, access to WASH services is limited in low-income countries. Despite its significance to public health, socioeconomics, and being exposed to the risk of COVID-19, now a days a lot of the most vulnerable populations lack access to reliable WASH services.18,19 This leads to a challenge of preventing and curbing transmission of potential pandemics of COVID-19 and future outbreaks. Frequent hand washing following hygienic standards requires a reliable supply of safe water, and sanitation systems that are well functional, including under challenging environmental conditions like climate change. The COVID-19 pandemic along with the inaccessibility to safe water, inadequate disposal of waste system, and poor treatment of wastewater in low-income counties can lead to severe situations. Awareness of maintaining good hand hygiene practice, risk management, and additional corrective actions needed to be implemented for individuals.28 According to Kampf et al,5 factors that can affect the survival duration of COVID-19 are temperature, type of surface, strain of the virus, and relative humidity.
Hand hygiene is a major element of the WASH framework program, that is, recommended by WHO as a protective measure to prevent COVID-19 transmission. However, in many low-income countries, WASH organizations are under funded and least prioritized despite its crucial for the control of infectious diseases and essential for economic growth.17,20 In low-income countries, specifically in unplanned urban population and rural settlements, most populations face accessing WASH services.19
According to the joint report from WHO and UNICEF globally, 26% of HCF had no basic water services, 20% of HCF had no sanitation service, and 16.7% of HCF had no hygiene service in 2016.16 WASH practices are crucial to preventive measures for slowing down the spread of the pandemic COVID-19. Currently there is no evidence reported on SARS-CoV-2 survival in potable drinking water and wastewater systems. Therefore, it is important to suggest that this is a good opportunity to think about COVID-19 to be present in these environmental components.8
In HCF and households, reliable water and sanitation services are vital for maintenance of hygiene conditions like hand washing, laundering, and environmental cleaning.18,19 Frequent and effective hand sanitizer with alcohol is important to protect from COVID-19, however the toxicity may be leads to fatal; attributed by absorption through dermal contact and accidental ingestion.29 WASH services are at a great risk of being disrupted by the pandemic, the response to it, and downstream effects. Great attention should be given to eating raw vegetables or fruits that might have been washed and contacted with untreated waste.11 Ensuring services like drinking water and sanitation are continuously available is important to governance, economic growth, and preventing development backsliding.30
Basic WASH services such as good hygienic practice and regular HWWS are important public health interventions in response to infectious diseases. However, globally, 3 billion people lack access to water and soap at home level.31 Therefore, governments and WASH practitioners should prioritize and enable the services of WASH for everyone in this time of the COVID-19 pandemic and give priority to those vulnerable populations and health care workers. To understand how these actions can be improved, it is crucial to know what countries have already put in place regarding hygiene policies and plans, finance, and targets.23
During the outbreak of Ebola in 2013 to 2016, inadequate management of waste was one of the attributing factors to the transmission of the disease and as a main factor for the deaths of thousands.32,33 This indicated that the provision of WASH services is vital to preventing and controlling the present pandemic COVID-19. WHO recommended that functional hand washing facilities with water and soap should be present within 5 m of the toilets.34 In a slum dwelling environment, obtaining a hand washing facility is difficult. It is estimated that around 67% of households in a slum dwelling environment share a water source. Hence, people living in a slum environment face difficult issues with obtaining adequate water and hand washing materials. The majority of people who live in slums have a poor economy and are engaged in daily work activities. As a result, they are not restricted from moving during the COVID-19 pandemic. Moreover, they have no basic knowledge and information about how to maintain good hygienic practice.34
Impacts of COVID-19 on WASH services
COVID-19 could pose a significant impact on sustainability and continuity of WASH services if not well taken mitigation measures. Fair distribution of WASH services and commodities for everyone is important to prevent and control the pandemic COVID-19. WASH services along with other protective measures like physical distance and self-isolation play an essential contribution in controlling the global pandemic COVID-19.35 The global pandemic COVID-19 may cause an immediate socio-economic impact that could decrease the contribution of WASH services and commodities to controlling the disease. Low-income countries with humanitarian crises and vulnerable populations are significantly affected by COVID-19. It is critical for WASH organizations and the sector to be resilient and sustainable in the face of socioeconomic crises.23
In developing countries, it is estimated that 0.13% to 1% of the gross regional product (GRP) is needed to achieve SDG 6 targets of universal access to WASH service by 2020.36 This will be significantly affected by COVID-19, which needs an urgent and additional budget. As a result, external development assistance would be required to assist WASH organizations during this critical period. Fair allocation of resources in the WASH organizations could include responding to the pandemic COVID-19.37
The present pandemic of COVID-19 causes an additional challenge to the quality and safety of laboratory diagnosis testing,38 and in HCF due to the generation of more waste than usual.20 In this pandemic time, HCF produces wastes like gloves, masks, and other PPE that could be infected with the virus.22,39,40 As a result, a lack of appropriate waste management can infect patients, health care workers, and the general public with COVID-19, which can survive on surfaces in the HCF and inanimate objects.28,41,42 WHO recommended that waste produced during the care of COVID-19 patients should be appropriately collected, treated, and disposed of.11,22
Insufficient access to WASH services and substantial interruption of WASH utilities will have a great influence on the service continuity and sustainability of the WASH organizations. This problem is devastating in countries with humanitarian crises and vulnerable populations. WASH equipment and material restrictions on entry and movement along with an increase in prices may influence individuals to maintain their hygienic condition and to control the pandemic. To solve the severity of the impact of COVID-19, urgent technical, financial, and material inputs are needed for the continuity of WASH services.43
Challenges to the provision of WASH services
COVID-19 patients in HCF have encountered difficulties in adhering to the recommended waste management procedures, which facilitates the possibility of COVID-19 transmission.24,25 A major issue in proper management of PPE used to frontline health care workers at HCF handling and caring of COVID-19 patients. Health care workers are at high risk from the transmission of COVID-19 from patients. Waste generated from confirmed COVID-19 patients must be handled with caution and treated as a biohazard.11,44 Furthermore, it needed separated latrines that should be disinfected and cleaned at least 2 times by a well trained cleaner using appropriate PPE.25
According to Ashinyo et al,21 strong WASH service infrastructure in the treatment center of COVID-19 is important to effectively management of COVID-19 cases. There are gaps in the management of the treatment center on WASH. This brings challenges in implementing WASH services in COVID-19 treatment center. This is significantly important for protecting from the pandemic COVID-19, improving health service delivery, maintaining the safety of health care workers and patients. Such intervention is vital for the safety of service delivery and for building a resilient WASH service for improved quality.
Lack of access to basic sanitation services and infrastructures significantly affects the health of the community.43,45 Across the world, 62% of fecal sludge and sewerage is not properly managed.45 Moreover, inadequate access to toilet facilities in the living environment indicates that individuals are not self-sufficient to isolate themselves during the pandemic COVID-19.27
Absence of adequate data can cause problems for WASH service management, specifically in the areas of water scarcity, climate change, urbanization, and population growth. Ensuring access to drinking water will require well organized data and evidence for managed urban development, good governance, and improved WASH sectors.26 To monitor the trend and to control service providers, donors, and governments need adequate data. However, many countries have a shortage of financial, institutional, and human power to analyze data to support and help governance.46 Inappropriate settlements cause difficult situations to obtain adequate data about how many people use the services.27
Finance resources are a main challenge for extending access to WASH services and meet the SDG 6 targets, with estimates range from $28.4 billion to $114 billion needed annually between 2015 and 2030.36 Financial resources are critical for capacity building, policies, and plans in order to sustainably extend and ensure access to WASH services. Many donors moved rapidly to disburse a great deal of funding. For example, the World Bank was provided more than $12 billion. In some phenomena, huge financing gaps happen in what is required to address targets of WASH and the funding present at hand. Interruption of the water system might be associated with lack of financial investment, political commitment, lack of energy, and WASH equipment. Well organized WASH service organizers and a sustained political environment are required to secure access to safe drinking water.27,47
Mitigation measures and strategies
Consistently used of HWWS and drinking potable water reduces the risk of infectious diseases.48 This is also recommended by WHO to prevent and control the current pandemic COVID-19. Hand washing with soaps was 90% effective in reducing SARS transmission in many countries.49 In low income countries, appropriately used and implementing of WASH services may bring many advantages. For instance in reducing the risks of water borne diseases like typhoid and cholera, and in increasing life expectancy and quality.50 Response to the COVID-19 pandemic, according to UNICEF’s WASH program, recommended intensifying awareness raising and training of communities and health care workers about HWWS, IPC, and PPE, as shown in Table 1 below.51 According to Gilmore et al,52 community participation and involvement strategies can be used to support for prevention and control of COVID-19. Inclusionary COVID-19 responses promote equitable access to WASH, which is critical for addressing inequalities and realizing human rights.36
Framework of WASH programs for response of COVID-19.51
Adequate amount of safe water should be present in HCF, especially at points of care (screening rooms, examination rooms, injection rooms, wards, treatment rooms, delivery rooms, and postnatal care rooms). Implementing of the IPC measure at household and HCF level is crucial for prevention of the transmission of COVID-19. Recommended cleaning and disinfection procedures in HCF should be followed consistently and appropriately. Surfaces and laundry in HCF should be routinely cleaned (at least once a day and when a patient is discharged). Providing reliable drinking water stations with pedal operated taps and devices to limit hand contact and reduce the risk of infection is also important.3,35
Uninterrupted supply chains and equitable access to all WASH services and commodities are essential to assure the exchange of products and goods, as shown in Table 2. This includes materials and supplies for the continuity of WASH services for households and HCF settings, and protection of service providers and assets without any restriction to the movement.35
COVID-19 and WASH services and response elements.53
Overall, ensuring WASH services for all will help to control pandemic transmission and to reduce other infectious diseases and mitigate other damage. Therefore, investing in public health facilities including WASH services can help as a protective measure to control the transmission of the COVID-19 virus, secure global health and strengthen the health system.51
Conclusion and Recommendations
This systematical review identified the impacts and challenges of COVID-19 in the provision of WASH services. The results implied that COVID-19 has significant impacts on the health of the public. The pandemic poses a significant impacts on sustainability and continuity of WASH services if not taken appropriate mitigation measures. Inclusive WASH services are critical for protecting and preventing public health from COVID-19. Ensuring universal access to WASH services for all is essential to tackling inequalities and realizing human rights. It needs to create a WASH user friendly environment that decreases opportunities for recontamination and facilitates good hygiene practice. Ensuring IPC measures are implemented and adhered to all HCF to reduce the pandemic COVID-19 and sustain WASH programs participation by active multi-sector coordination is needed. Community engagement also can be used to support for prevention and control of COVID-19. Therefore, countries need to expand their investment in WASH services as an important mechanism in mitigating the COVID-19 pandemic.
Author Contribution BD designed the study concept, identifying relevant articles for the study, and writing report and manuscript.
Data Availability All relevant data are included in the paper.