Hmmm I suspect that it was covid induced gut biomangulation resulting in leaky gut, which maybe lays the foundation for resultant celiac disease, but who really knows, except usually the hen lays the egg :).

Ironically, I know people WITH celiac disease who did just fine with covid..... and it seems to me that everyone gets hit differently. Amongst family members I was the only one who go the throat of razor blades, whereas my older son got the jack-hammer headache.... and another member got super achy joints.... Maybe it seeks out the weak points. I don't have tonsils and adenoids....