Another concerned scientist on Nostr: "About 70 percent of people said they had been through a Covid infection already, ...

"About 70 percent of people said they had been through a Covid infection already, suggesting that they believed they had some immunity or at least that they could muscle through it again if need be."

There must be many asymptomatic infections, because waste water suggests that Americans have had on average 3.5 infections.

https://www.nytimes.com/2024/08/27/health/covid-19-tests-vaccines-masks.html