The case for masking up: new study shows tight-fitting #FFP2 & vKN95 face masks drastically reduce the risk of #COVID19 infection - but even ill-fitting masks still significantly reduce the risk of infection bit.ly/31m9JKE
@maxplanckpressThe case for masking up: new study shows tight-fitting #FFP2 & vKN95 face masks drastically reduce the risk of #COVID19 infection - but even ill-fitting masks still significantly reduce the risk of infection bit.ly/31m9JKE
@maxplanckpress