Testing is so imprecise... I remember when my 3 kids and I had pertussis. We went to my dr to get tested as a group. We were all about 1-2 weeks into the coughing, and had found out that their cousin had tested pos. for pertussis.Well, I figure if one of us has the antibodies, we all probably do!
It wasn’t just the cough, but the 2-week long fever. Any kind of sickness throws my body systems all out of whack - even stress has fucked up my cycle in the past.
(BTW, the kids were about ages 10-14 at the time. We were homeschooling, so they didn't infect anyone else. Oh, and it was summer anyway. Once we started coughing we didn't go out in public. The cousin was homeschooled too, in a different state. My kids' dad never came down with it.)
We had throat swabs. 2 of us tested pos. and 2 tested negative! I don't know about our antibodies afterwards. But it seemed so odd at the time that 2 of us tested negative, while having the same symptoms as the positive people. I suppose if you don't test pos for Covid, you could have had pertussis. *shrug*