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Är du så kränkt för att du har fel i allt du bajsar ut ? Du kan inte länka till den samlade vetenskapen du så¨gärna nämner för det är en lögn, precis som allt annat yrar om. Du vet , Mexico har betalat en mur som inte byggs
4 år av orangutangen och du är lika korkad fortfarande.
These masks don't seal against the face but do include non-woven polypropylene layers that are moisture resistant. In a surgical mask, about 70% of the outside air moves through the mask and about 30% travels around the sides, Chu told Live Science. For that reason, they don't offer as much protection as N95s.
That leaves fabric masks, which currently are recommended for general use by the CDC. Fabric masks also allow air in around the sides, but lack non-woven, moisture-repelling layers. They impede only about 2% of airflow in, Chu said.
All of this leakage in surgical and fabric masks are why public health officials generally don't believe that wearing a mask prevents anyone from catching a virus that is already floating around in the environment.
https://www.livescience.com/are-face-masks-effective-reducing-coronavirus-spread.html