The Pfizer vaccine

 I's like to see how the advocates can shrug this one off.

More than a third of a subset of people who received the Pfizer-BioNTech coronavirus vaccine in the U.K. in December reported experiencing side effects, a study released Thursday suggests, though symptoms were largely confined to local reactions and rarely lasted beyond a few days.

According to the findings from Zoe, a British health science company that built a phone app that researchers are using to study the pandemic, 37% of a group of roughly 40,000 vaccine recipients who were mostly healthcare workers reported they experienced local side effects such as swelling or pain near the injection site after their first vaccine dose, and that the figure rose to 45% of people after the second dose.

Systemic, or full-body side effects like fatigue, headaches, chills or shivers, were more rare: 14% of respondents reported at least one systemic side effect after the first dose, but that number rose to 22% after the second dose.

Women (19%) were slightly more likely than men (13%) to report feeling a systemic side effect within a week of their vaccine, and people over 55 years of age (14%) were less likely than someone younger than 55 (21%).

The side effects reported in the Zoe study occurred at a far lower rate compared to FDA trials for the Pfizer/BioNTech vaccine, which found 84% of people experienced injection site reactions and also reported higher proportions of people also had systemic side effects like fatigue, headache and muscle pain (63%, 55% and 38%, respectively).

Given that the Zoe study was largely of healthcare workers, there may have been population differences between it and FDA trials

https://www.forbes.com/sites/carlieporterfield/2021/02/04/more-than-one-in-three-people-in-uk-study-report-side-effects-from-pfizer-coronavirus-vaccine/?sh=5f0e8e1639ef