The pertussis (whooping cough) vaccine nearly killed me when I was a child.
So you should want everyone else to get it. While hypersensitivity to a vaccine is rare, it does happen and is a valid reason to get get vaccines. But if everyone else does, you are still protected. (Herd immunity) Or, keep your tinfoil hat on and continue denigrating people who have 12 years more training than you do in exactly this. Darwin works, and you will solve yourself soon enough.
How do we know that it was the vaccine that nearly killed one quote above..
Hypersensitivity to one item is rare but to all the things in life a lot less rare.
How do we as readers eliminate the possibility that this was not hyper sensitivity to peanut butter
or other common trigger.
I would offer those that fear hypersensitivity that a subcutaneous bubble/ blister or tine test could
be developed to screen for this risk. Perhaps it should be. Those with allergies know the chess
board grid on their back screening method. Also an epi pen could be sealed in a container
and used if needed. Because it is sealed it could be reissued after resealing a couple weeks later.
The darn things have gotten expensive... (for crazy patent reasons).