“ 10% is high. 3.4% is lower than national average which I'd have to read email again but was 4.5% of tests positive nationally.”
Hang on if I have understood you correctly you are comparing different things
10% is symptomatic cases among positive cases. We don’t know how many were tested overall (everyone arriving on campus? I have no idea)
3.4% and 4.5% are positive cases from tests done on people with symptoms?
So it’s a completely different selection of people and the two percentages cannot be compared