40 ms·
I'm not sure how effective that will be if the sick person isn't also masked.
by berberous 5y ago
I'm not sure how effective that will be if the sick person isn't also masked.
- mensetmanusman 5y agoN95s are designed to protect the wearer from situations like that, even for 8 hours of contact. Cloth masks will not work in that situation though if the sick person isn’t masked.