have you ever looked at the adverse effects the BNT162b2 mRNA Covid-19 Vaccine on people?
The Pfizer vaccine? Sure. Mostly pain at the injection site, some swelling, some irritation, fatigue, and headaches. Pretty normal stuff.
About 1 in 90,000 (0.001%) have a severe anaphylactic reaction. This mostly happens in people with a known severe allergy issue (e.g. people who have to carry an EpiPen with them everywhere they go). https://www.cdc.gov/mmwr/volumes/70/wr/mm7002e1.htm
These reactions are readily reversible, typically with a shot of epinephrine. When you get your shot, they have you wait for 15 minutes (they actually set a timer) to ensure you aren’t one of the unlucky folks who have that kind of reaction. With Moderna’s vaccine, that rate is 1 in 400,000 (0.00025%). https://www.cdc.gov/mmwr/volumes/70/wr/mm7004e1.htm
In either case, it’s unlikely you’ll ever meed anyone who’s had a bad reaction to either. In my case (Moderna shot), my left arm was sore for about 2-3 days after the first shot. And I mean it was pretty sore. Not sore as though I thought I was dying, but sore like I had done a ton of working out all of a sudden. The second shot left my arm much less sore and for just about a day. There was also so extremely mild swelling. Colleagues who’ve had the shot also reported some cases of significant fatigue for a day or two after.
I’ve seen many who would have gladly traded their COVID-19 experience for a couple days of a sore arm.