Covid 19: Scientists continue giving warnings about the importance of good air quality.

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239 scientists from 32 different countries wrote an open letter to the World Health Organisation. They shed the light on risks due to contamination through very small airborne droplets inside buildings, and the WHO is already changing its official recommendations.

The origin of Covid 19 remains unknown. The answer to this pandemic and the actual position of the reference authorities are constantly moving, following scientific advances.

Covid-19 is transmitted by small aeroported droplets.

All the specialists tend to say that SARS-CoV-2 can be transmitted by airborne way, via droplets projected by a person in the air when the person is coughing, sneezing or speaking… However we still don’t know the minimal size to transmit the virus: the WHO estimated that only the biggest ones (that fall immediately on the ground) can transmit the virus, but the organisation is now changing its position.

“The Coronavirus is airborne”: Aerosols are pointed out by the scientific community.

The New York Times published a letter co-signed by 239 scientists from 32 different countries. The letter, addressed to the WHO, brings awareness on risks of a new way to transmit the virus by small droplets. These small droplets could reach several meters and cross an entire room. It can contaminate many people if the room is poorly ventilated. 

The WHO warns people of risks in restaurants, night clubs, and workspace…

The World Health Organisation has changed its advice on its anglophone website and is now mentioning risks linked to transmission in enclosed areas and poorly ventilated spaces.

There have been reported outbreaks of COVID-19 in some closed settings, such as restaurants, nightclubs, places of worship or places of work where people may be shouting, talking, or singing. In these outbreaks, aerosol transmission, particularly in these indoor locations where there are crowded and inadequately ventilated spaces where infected persons spend long periods of time with others, cannot be ruled out.

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Television report on a Japanese study concerning coronavirus’ transmission by airborne way.

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