Home tests get a lot of false negatives, especially if your case isn’t severe. Vaccination seems to help prevent sequelae, but the vaccines haven’t been keeping up with the virus variants, so there’s that. Repeat infections increase the risks. That’s why I suspect Biden’s condition is due to infections, though of course I can’t know for sure. Trump of course had at least one pretty bad case too.

The main thing I try to do is not get infected, by wearing N95 respirators in public and using HEPA air filtration at home. It’s great if your partner is willing to do the same thing. The Biden admin seems to want us to get infected as long as it keeps us shopping. Unfortunately I don’t have much clue about what to do if you’ve already been infected. I’m mostly about prevention.

For way too much information about airborne transmission, see covidisairborne.org .

Another possibility (mentioned by someone on reddit) is that you had it first and that your partner got it from you. :( It doesn’t matter much by now, but I’m mentioning this because that reddit commented gave me a poke.

The good news is being vaccinated and boosted greatly reduces your risk of long covid even if you do catch it.