By looking at the pictures on this site, Samaritanspurse... they didn’t have any way near the kind of protection given to them in Africa as they will here in the USA.
Impossible to tell really, but he’s certainly completely exposed in that picture, as is the person who he’s working with, even tho’ she is wearing scrubs and a mask.
He looks like he’s a fine fellow, as does the woman, but as we know nature doesn’t really care about one’s character.
There’s a better picture here, borrowed this link from another thread. They look pretty covered up, but basically if you’re not in a space suit I’ve got doubts.