Came to say this. This reaction is called Antibody Dependent Enhancement and was the reason for the failure of the early attempt to make a vaccine against SARS-1. "All the animals died" as so frequently repeated here. They weren't dying from the vaccine! They were dying because the vaccine worked and increased their antibodies, then when they were exposed they died from their own immune reaction. Fortunately not that many pathogens cause this reaction, but that was my first fear about the COVID vaccines.
Came to say this. This reaction is called Antibody Dependent Enhancement and was the reason for the failure of the early attempt to make a vaccine against SARS-1. "All the animals died" as so frequently repeated here. They weren't dying from the vaccine! They were dying because the vaccine worked and increased their antibodies, then when they were exposed they died from their own immune reaction. Fortunately not that many pathogens cause this reaction, but that was my first fear about the COVID vaccines.