DEC said "I'm just curious as to why most people are being tested 3 or more times. Is it because you'd had symptoms or been in situations where someone close may have been positive or some other reason? Possibly all heath care workers? "
I've been tested 3 times because I've had 3 illnesses with symptoms consistent with Covid. Others in my household have been tested on 1-2 times, depending on the person.
As someone else said, once illness enters the house no one can go to work/school until you've either confirmed it's not Covid (and symptoms have resolved) or you've waited out the mandatory isolation period. We have 5 kids (4 of them in school) and 2 adults, so things can and do come into the house even with the precautions. My kids have missed a solid 2+ weeks of school due to illness/testing/isolation protocols so far this year.