Tomorrow you have a .0001% chance of dying. Care to increase that to 1%? (E.g. walking through a bad thunderstorm.) Or 10% (Walking through a battlefield or in the middle of a busy superhighway.) Then are you willing to live with that level of risk every day for the next nine months? In time, increased risk adds up to real danger.

You also overlook the many people on campus who are over age 30 -- all profs, and most academic and support staff. Infected students will mix with them and increase their risk to a dangerous degree that none of them would welcome.

Or are you thinking that you can run a college with only students and no staff? Dream on.