btw, face mask over the n95 is insufficient. Needs to be sealed over the eyes too.
HIV is a BL3, this is a BL4.
No hospital has BL4.
And it has to be an N100 mask. Maybe a N99 or N98 would work. Certainly better than 95% removal. But wearing an N95 mask with a splatter protector, means you will be exposed. Over 2,000 Doctors and Nurses (Hospital staff) in China have it.