Allergic reactions to the Pfizer or Moderna COVID vaccines are very rare, and a new study questions whether many of those that do occur are even real.
In a small new study of 16 people who said they’d experienced an allergic reaction to a dose of the Pfizer vaccine, those who got a follow-up placebo (fake) vaccine were more likely to complain of another round of “allergic” reactions than those who got the real thing.
