One of my ex friends is a Ph.D. mathematician and his wife is a Ph.D. biologist. They crawled under their covid rock and still have not emerged. They do fly to Hawaii to visit their son, d-i-l, and grandchild, but that's about it. He was diagnosed with pericarditis after his shot. He had a 6-month recovery period. I mentioned that it could have been a result of the shot. He denied that and said that only younger men might be susceptible to that possibility. We no longer speak.