1/ As of Friday afternoon, @CDCgov had already learned of 3,150 people who'd received the vaccine had already been "unable to perform normal daily activities, unable to work, [or] required care from doctor or health care professional"...

https://www.cdc.gov/vaccines/acip/meetings/downloads/slides-2020-12/slides-12-19/05-COVID-CLARK.pdf

2/ That figure supposedly represented about 1.5% of the 215,000 vaccine recipients. Not really, through. Vaccinations increased exponentially last week; on Friday alone, 127,000 people were vaccinated. Unless people had and reported adverse events IMMEDIATELY...

3/ The denominator is far lower than 215,000 (the numerator will have a lag too, but the other way). If the lag is one day, almost 4% of the first 88,000 recipients have had a serious adverse event - AFTER THE FIRST SHOT OF THE PFIZER VACCINE...

4/ Remember, the Moderna vaccine is worse, and the second shot is much worse. Also of note - hospitalizations or physicians' care are included here, but not broken out separately. They should be.