[lkbm]

The data you link says that unvaccinated people have 5x the risk of testing positive as vaccinated (no booster) as of October (Slightly higher for Pfizer, lower for J&J). I believe that's 80% efficacy. How do you get 10%?

Note also that this data is as of October 2021, so it's primarily looking at the efficacy against the Delta, whereas the original 90-whatever % claims were obviously the original virus.

Pfizer et al certainly weren't saying in March 2021 that "Pfizer provide 90-100% protection against COVID and all future variants" and I've never heard anyone suggest they thought that's what the claim was.