With a mask of increased protection or a double mask, from tomorrow, Friday, the entrance to the public transport and the supermarkets will be allowed, as announced by the Minister of Health Thanos Plevris, regarding the new measures for the confrontation of the virus.
How much protection KN95 masks provide
According to data from a German study by scientists at the Max Planck Institute, FFP2 / KN95 / N95 masks (enhanced protection masks), if applied well to the face, without letting air in and out of their edges, can drastically reduce less than 1% risk of coronavirus infection.
In fact, in the case of two people without masks talking and one has a viral load, if the one who does not have the virus wears this mask the risk of infection will not exceed 20% even after an hour of discussion. In the corresponding case that no one wears a mask or wears a simple mask the risk of infection is close to 90%.
The study estimated that if both a person infected with coronavirus and an uninfected person wear well-fitting enhanced protection masks, the maximum risk of infection after 20 minutes even at close distances is about one in a thousand (0.1%), that is, a chance in a thousand to stick to each other.
The researchers pointed out that the chances of infection they calculated are the highest, while “in everyday life the real chance of infection can be ten to 100 times lower”, which largely depends on how much air leaks or enters from the extremities. of the mask when it does not fit well on the face.
They also calculated that a well-applied FFP2 or KN95 mask provides up to 75 times more protection than a well-applied surgical mask. The latter in turn, even when not applied well, significantly reduce the risk of infection in the absence of a mask.
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