3 ms·
What is your "except maybe a very specific mask usage"? Because i thought the well studied data was clear on mask usage.
by adkadskhj 6y ago
What is your "except maybe a very specific mask usage"? Because i thought the well studied data was clear on mask usage.
- worker767424 6y agoAt least over the summer, most of the studies were in medical settings, in vitro, or had some other asterisk attached that made it hard to generalize.