Part of the problem is to just group all Covid-19 shots as if they were the same thing. They are very different technologies. I got a Pfizer–BioNTech booster,

Part of the problem is to just group all Covid-19 shots as if they were the same thing. They are very different technologies. I got a Pfizer–BioNTech booster, and it was of course fine. I don't want and would not get the Sinovac booster.