Two people in Alaska have had an allergic reaction after getting the Pfizer vaccine: https://nyti.ms/3r3lePi 

We're up to 4 people globally out of tens of thousands of people who have received it, which means this reaction is still very, very rare.

If we just go with the confirmed number of the 44,000 of us in the trial, 4 people having an anaphylactic reaction is .009%. And the *actual* number is smaller than that, because I can't find a number for how many people have actually received the vaccine.

It's going to be important to hang out for 15 or 20 minutes after you get your shot. Because this is very treatable and you will be fine if you're one of the >.009% as long as help is right there.

I cannot stress enough how small this number is. It's probably conservative to say that we've doubled trial numbers, which means that you're actually probably looking at >.0045% having an anaphylactic reaction.

It's getting media coverage because it's exciting and all of this is new, which is going to make people think it's more common than it is, a lot like the "reinfection" stories that didn't get contextualized with all the things that can look like it but aren't.

So hold that number in mind. The rate of serious allergic reaction is certainly >.009%. I'm comfy saying it's definitely below .0045%. Your comfort with my numbers may vary.

For comparison, 1.3% of children and 0.2% of adults are unable to get a flu shot because of egg allergy. The numbers for this vaccine are *tiny*.

This is worth noting as well - the two incidents in the UK and the two in Alaska happened to people vaccinated at the same time and place. So there's a lot of questions. https://twitter.com/nothingsmonstrd/status/1339561487585726465?s=19