4 ms·
Your first citation calls out a difference between "masks" (which protect the environment) and "respirators" (which protect the western and environment) and are
by IggleSniggle 7y ago
Your first citation calls out a difference between "masks" (which protect the environment) and "respirators" (which protect the western and environment) and are the N95 discussed on this thread. Thanks for helping to clarify the differences.