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  Corona menu Surfaces and hygiene  
       
 
1. How long does the novel Coronavirus survive on surfaces?

Currently available scientific evidence shows that the survival time of the virus on surfaces varies depending on the type of surface considered. The recent report of the Higher Institute of Health  concerning the recommendations on the sanitization of non-healthcare facilities in the current COVID-19 emergency (surfaces, indoor environments and clothing) and the May 22, 2020 memo report the detection time of viral particles on the most common surfaces, varying from several hours (e.g. on paper) to several days (e.g. on plastic and stainless steel).

However, it must be considered that the data available so far, being generated by experimental conditions, must be interpreted with caution, also taking into account that the presence of viral RNA does not necessarily indicate that the virus is vital and potentially infectious.

The use of simple disinfectants can kill the virus by eliminating its ability to infect people, e.g. disinfectants containing alcohol (ethanol) or sodium hypochlorite (bleach).

Remember to clean frequently used items (mobile phone, earphones, microphone) first with soap and water or other neutral detergents and then disinfect them with products containing sodium hypochlorite (bleach) or ethanol (alcohol), following the manufacturer's instructions.

Read the ISS report Interim recommendations on sanitizing non-health care facilities during the current COVID-19 emergency: surfaces, indoor spaces, and clothing.

2. What are the rules for sanitization/hand washing?

The purpose of hand washing is to ensure proper hand cleansing and hygiene through mechanical action.

Common soap is sufficient for hand hygiene. In the absence of water, so-called alcohol-based hand sanitizers can be used.

If soap is used, it is important to rub your hands for at least 60 seconds. If soap is not available, use a hydroalcoholic solution for at least 20-30 seconds.

Commercially available products for hand sanitization in the absence of soap and water (medical and surgical devices and authorised biocides with microbicidal action) should be used when the hands are dry, otherwise they are not effective.

It is important to wash your hands:

Before

  • touching each other's eyes/nose/mouth (e.g. to smoke, use contact lenses, brush teeth, etc.).
  • eating
  • taking medications or administering medications to others

Before and after

  • handling food, especially raw food
  • using toilets,
  • medicating or touching a wound
  • changing a baby's diaper
  • touching a sick person
  • touching an animal

After 

  • attending public places (shops, clinics, stations, gyms, schools, cinemas, bus, office, etc.) and, in general, as soon as you return home
  • handling garbage
  • using money
  • touching other people.

It is also a good practice to cough/sneeze in your elbow crease to avoid contaminating your hands, with which you can subsequently transmit your microorganisms (e.g. by touching your mobile phone, door handle, etc.).

Finally, it is recommended to use disposable tissues to blow your nose, (possibly eco-friendly tissues), and to dispose of them in the waste, washing your hands, immediately after use.

3. What is the difference between sanitation, disinfection, sanitization, and other cleaning procedure

Sanitization: it is a "series of cleaning and/or disinfection procedures and operations", which includes the maintenance of good air quality, changing the air frequently in all environments.

Disinfection: is a treatment to reduce the microbial load of environments, surfaces and materials and must be carried out using disinfectant products (biocides or medical and surgical devices) authorized by the Ministry of Health. These products must be labelled with the registration/authorisation number.

Hygiene: this is the equivalent of cleaning and is intended to make the environment hygienic, i.e. to clean the environment by eliminating the harmful substances present. Products without an authorisation from the Ministry of Health, which are labelled with indications on their activity, e.g. against germs and bacteria, are not products with a proven disinfectant activity but are simply environmental cleaners (sanitisers).

Cleansing: consists in the removal of dirt and microorganisms, with a subsequent reduction of the microbial load. Cleaning is mandatory before disinfection and sterilization because the dirt is rich in microorganisms that actively multiply in it and can reduce the activity of disinfectants.

Cleaning: cleaning is carried out using environmental cleaning/hygienising products - the two terms are equivalent - which remove dirt by mechanical or physical action.

Sterilization: physical or chemical process that leads to the targeted destruction of every living microbial form, both in vegetative and spore form.

Read more 

4. Is it safe to receive packages from countries where COVID-19 has been reported?

Yes. The WHO has stated that the likelihood of an infected person contaminating commercial goods is low and the risk of catching the virus from a package that has been exposed to different conditions and temperature is also low. 

5. Is it necessary to spray the streets with disinfectants (e.g. hypochlorite)?

There is no evidence that walking surfaces are involved in transmission of the virus. Moreover, spraying hypochlorite could increase the amount of harmful substances in the environment. Street cleaning with conventional soaps/detergents is still advised.