Thread by @DavidLat

1/ THREAD. Good news: my #COVID19 antibody levels are literally off the charts. On a test where >0.79 is positive, my titer is >2,500.👇

2/ But I believe the test I took, Elecsys® Anti-SARS-CoV-2 S, measures antibodies to the spike protein, i.e., from vaccination. So I think I’d need to take a nucleocapsid antibody test to learn if I had Omicron.
bit.ly/3Glx7Xo

3/ I think I might have had Omicron in December 2021, but I never tested positive on either a PCR or antigen test (perhaps because I didn’t get tested until having had symptoms for 5-7 days).

4/ I got #covid in 3/20. My N antibodies waned over time, from 4.3 (as of 6/20) to 3.2 to 2.3 to 1.5 (as of 4/21), where >1.4 is positive.

So if I took a nucleocapsid test today and my N antibodies where through the roof, maybe I had Omicron?

5/ My last shot, my third/booster shot (of the Pfizer vaccine), was on 11/2/2021.

So 3 months later, I still have very high antibody levels. That’s good news, even if I can’t tell whether these antibodies are from vaccination, infection, or both.