Disinfection Against CoVid19

November 3, 2021

Three mechanisms of transmission of the SARS-CoV-2 virus that causes COVID-19 disease are known, including droplet, aerosol, and contact transmission.
Spread at the community level is generated by person-to-person transmission, and occurs most frequently between close contacts (at a distance of less than one meter). This type of transmission occurs through respiratory droplets, which are produced when talking, coughing or sneezing. These droplets can also remain on objects and surfaces, which have been estimated to be viable for hours or days.

SARS-CoV-2 being a virus with a lipid envelope makes it more susceptible to disinfectants compared to non-enveloped viruses. Thus, cleaning visibly dirty surfaces and then disinfecting them with suitable products is one of the prevention and control strategies for the transmission of COVID-19 in community settings.

  • Cleaning means removing organic matter, dirt, and impurities from surfaces by mechanical scrubbing.
  • Disinfecting means using chemicals to remove infectious agents from surfaces. It is important to point out that the disinfection is effective, it is necessary to previously carry out an adequate cleaning.

What you should know

  • Wear disposable or reusable gloves for routine cleaning and disinfection.
  • Clean surfaces with soap and water, and then use disinfectant.
  • Clean or wash items according to manufacturer’s instructions.
  • Wash your hands often with soap and water for at least 20 seconds.
  • If there is a sick person, assign a separate bedroom and bathroom for this person (if possible).

How to clean and disinfect

  • Wear disposable gloves for cleaning and disinfecting and throw them away after use, or use reusable gloves that are exclusively for cleaning and disinfecting. You should always wash your hands after removing your gloves.
  • Clean dirty surfaces with soap and water first, then use disinfectant.
  • Clean or wash items according to manufacturer’s instructions.
  • Wash your hands often with soap and water for at least 20 seconds.
  • If there is a sick person, assign a separate bedroom and bathroom for this person (if possible).
  • To disinfect, use a household disinfectant listed on the  Environmental Protection Agency (EPA) List N: Disinfectants for Coronavirus (COVID-19)external site icon.
  • Follow the directions on the label to ensure safe and effective use of the product. Read the EPA infographic on how to use these disinfectantsexternal site icon safely and effectively. Many products recommend:
    • Keep the surface wet with the disinfectant for a specified period (see product label)
    • Precautions such as wearing gloves and ensuring good ventilation when using the product

If you do not have  List N products: Disinfectants for coronavirus (COVID-19)external site icon from the Environmental Protection Agency (EPA), household chlorine bleach solutions can be used for many non-porous surfaces as they will be effective against coronaviruses if dilution is correct.

  • See articles against Covid19 in the Store

    Most household chlorine bleaches contain 5% -9% sodium hypochlorite. Do not use chlorine bleach if the percentage is not specified or within the range. This includes certain types of laundry bleach or anti-spatter bleach, which are not suitable for disinfection tasks.

  • Follow the directions on the bleach container to prepare a dilute chlorine bleach solution. If the packaging does not include directions, you can make a bleach solution by mixing:
    • 5 tablespoons (1/3 cup) chlorine bleach per gallon of room temperature water or
    • 4 teaspoons of chlorine bleach per quart of water at room temperature
  • Follow the manufacturer’s application instructions for the surface in question. If no directions are available, allow the diluted chlorine bleach solution to act on the surface for at least 1 minute before removing or wiping it off. This is called the “contact time” for effective disinfection. The surface must remain visibly wet during the contact time.
  • Ventilate the rooms well during the application and afterwards (for example, open the windows).
  • Never mix household chlorine bleach (or any disinfectant) with any other cleaner or disinfectant. Doing so can create vapors that could be very dangerous if inhaled.
  • Prepare a new diluted chlorine bleach solution daily. Diluted chlorine bleach solutions will not be as effective after being mixed with water for more than 24 hours.

Personal safety when preparing and using disinfectants

Sanitizing solutions should always be prepared in well ventilated areas. Avoid combining disinfectants, both during preparation and during use, as such mixtures cause respiratory irritation and can release potentially fatal gases, particularly when combined with hypochlorite solutions.
In non-healthcare settings, conditions permitting, where disinfectants are being prepared and used, the minimum recommended Personal Protective Equipment (PPE) is rubber gloves, waterproof aprons, and closed-toe shoes. Eye protection and medical masks may also be needed to protect against chemicals in use or if there is a risk of splashing.


The best ways to keep your family healthy during the COVID-19 pandemic are to stay home and  keep your distance  from others and get good sleep and exercise. Read, play games, dance, and find ways to support each other. However, we need to pay much more attention to hazards in our homes while we are protecting ourselves. Talk to your pediatrician if you have any questions about keeping your family safe and healthy during the COVID-19 pandemic.

Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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