Spraying disinfectants on streets is not recommended, WHO wa
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Titled “Cleaning and disinfection of environmental surfaces in the context of COVID-19,” the guidance warns against spraying disinfectants in outdoor spaces such as streets to kill the coronavirus.

• Disinfecting sidewalks and unpaved walkways would be less effective. The health experts also emphasized that sidewalks and streets are not considered as reservoirs for the coronavirus.

• Chemical spraying may not adequately cover all surfaces for the duration of the needed contact time to inactivate the virus.

• In addition, the WHO warns against spraying people with disinfectants, like in chambers or tunnels. “This could be physically and psychologically harmful and would not reduce an infected person’s ability to spread the virus through droplets or contact,” the document reads.

• The same goes for indoor spaces, such as hospitals and workplaces. Spraying may not be effective in removing organic material and may miss surfaced covered with objects. Further, doing so may pose serious health risks, such as eye irritation, skin irritation, and respiratory issues.

How to kill the coronavirus?

• In disinfecting surfaces, it is better to use a cloth or a wipe soaked in a disinfectant solution. Since the SARS-CoV-2 can attach itself to surfaces for many days, wiping the surfaces is more effective.

• Usually, cleaning with water and soap, along with some form of mechanical action like scrubbing, remove the dirt, debris, and even secretions. However, it is not enough to kill microorganisms. It is vital to prepare disinfectants based on the manufacturer’s recommendations.

• “Follow the manufacturer’s instructions to ensure that disinfectants are prepared and handled safety, wearing the appropriate personal protective equipment (PPE) to avoid chemical exposure,” the WHO explained.

Note: Guidance released by WHO is attached as pdf.

Sources:
World Health Organization (WHO). (2020). Cleaning and disinfection of environmental surfaces in the context of COVID-19. https://www.who.int/publications-detail/cleaning-and-disinfection-of-environmental-surfaces-inthe-context-of-covid-19
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