(Undark) – Experiencing a severe side effect is rare, but officially documenting such cases is vital to designing better vaccines.

I wrote about the experience in 2021 in The Boston Globe, after the FDA attached a warning to the J&J shot, citing an unacceptable occurrence of this adverse effect. At the time, I bemoaned that it was so difficult to talk about vaccine side effects and argued that government and public health officials should just face up to them honestly. People could handle the truth, I said, and everyone would benefit because acknowledging those rare occasions when things go wrong would allow vaccine makers to design a better product.

Three years later, that still hasn’t happened. (Read More)