Couple things -
"... likely to stay positive for a day or two."
I'm pretty sure you will be positive for more than a couple days. Probably could be up to ten days plus or minus. Others will know more about that than what I know.
"... they were looking for people who were out a lot rather than retired folks, at the time I talked to them."
Wife and I (84yo now) have been retired for a long time. I had contacted two or three other sites before getting accepted. Finally I sent a detailed Email to the Ann Arbor site explaining that we go to Casino's, do our shopping and in fact I was visiting a cardio rehab facility twice a week at a hospital filled with Covid patients. Within hours I got an Email reply of acceptance.