2 ms·
if the latter is true, then wouldn't that be an indicator that masks do not, in fact, work as well as thought?
by packetlost 5y ago
if the latter is true, then wouldn't that be an indicator that masks do not, in fact, work as well as thought?
- jasonlaramburu 5y agoIt could, or it could mean that the protective effect of surgical masks is most pronounced indoors.