[CydeWeys]

6' is nowhere near enough distance to be safe indoors in a room with potentially up to hundreds of other people in it. The virus can stay airborne for hours in enclosed indoor spaces.

If you have a lecture hall of 100 people that meets regularly each week, and the people in it aren't wearing good masks, it's practically a guarantee that by the end of the semester everyone there will have gotten it.

[enraged_camel]

Yep. Don't forget about air conditioning, as well as shared facilities such as restrooms, break rooms, cafeterias, and so on.

[abalashov]

And don't forget _bad_ air conditioning / poor ventilation in old buildings, with which universities are replete.