5 things you don't know about COVID-19

Know the transmission of the virus by air.

Health news flash:

stérilisation uvc covid
  1. The Sras-Cov-2 virus is an organic element whose average size is 100nm, i.e. 0.1 micron (between 0.06 and 0.14 microns)


  2. According to Antoine Flahault , director of the Institute of Global Health at the University of Geneva, “at least 70% of contamination is caused by aerosols” .


  3. Intensive hand washing only reduces the risk of transmission among respiratory viruses by 15% . (Source: Institute of Global Health of the University of Geneva)


  4. The three criteria for transmission of COVID-19 according to the WHO:
  • Crowded spaces;
  • Close contact, for example when people are talking while standing very close to each other;
  • Confined and enclosed spaces, poorly ventilated.

  1. According to the INRS, care (or surgical) masks do not protect against the inhalation of very small particles suspended in the air.

What are UVs?

These are electromagnetic waves that are invisible to the naked eye, they are also known as “black light”. UV rays have more or less long electromagnetic wavelengths but are always lower than that of light, which is what makes them invisible to the naked eye.

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