Ideally, everyone (not just medical workers) should be using a KN95 or N95 mask for optimal protection when COVID cases are high or when there's a contagious variant like Omicron, according to the ...

As we saw with COVID-19, the masks most effective in protecting against smoke inhalation are N95 respirator masks and KN95 masks. However, Lang emphasizes that even a fabric mask or bandana is ...