Covid is very mystifying. DH and I took a major risk and went to the college basketball Final Four in New Orleans a month ago. 72,000 people in a huge stadium, packed, every seat taken, screaming and yelling. DH and I were about the only people wearing a mask (we wore N95s). We did not get Covid (we tested ourselves several times after we returned home) and doing an informal poll of all the people I know from my area who went (probably 100 or or more people), I can find no one who got Covid at the Final Four. On the other hand, good friend of mine went to a neighborhood party inside a house 6 weeks ago. 12 people at the party, no masks but everyone was vaxxed and at least one booster. Of the 12 people in attendance 9 came down the Covid (my friend who caught Covid at the party was very sick and is still having a lot of fatigue 6 weeks later).
None of this makes sense to me.