I have some 3M masks that are good against anything, even Anthrax. Looks like I’ll have to get some more.
It is not just the mask that is needed, you need to know how to properly decon yourself or family/friends.
I suspect the doctors got sick due to improper doffing of protective PPE, contacting surfaces in the decon area/hot zone.
Do you have eye protection as well? Your eyes are vulnerable as well.
You need P100 filters. N95 almost worthless.