Sounds like we had a similar respiratory disease. I also flew through SFO, like many millions of others, in December. I fell ill over the holidays, and then aga

Sounds like we had a similar respiratory disease. I also flew through SFO, like many millions of others, in December. I fell ill over the holidays, and then again in January. I also rarely fall ill, and hadn't had a cold or even severe allergies for several years. My primary symptom was respiratory, I could go up a single flight of stairs and feel short of breath, like someone was standing on my throat and lungs. I saw my doctor a few times about it, but neither my partner, nor my family, nor my co-workers fell ill. The phylogeny that I've seen published about SARS-CoV-2 definitively rules out that I had it. Likewise, if I did I'd expect that based on how virulent covid-19 is, I'd expect someone else I know or one of my grandparents to have caught it. I've seen similar reports of a respiratory illness on Twitter and I think it comes down to a uniquely bad flu season and perhaps some other bug going around which hits the respiratory system.