This is horrible.

Yes vaccines can prevent disease.

But also a small percentage of some people are seriously injured by them.

Why is a test not done prior to the vaccination?

I can take my cat to the vet and if it needs to be sedated for a procedure the vet will do a test to see if the cat has developed an allergy to the sedative. He also can do tests before feline vaccinations to determine if the cat will be harmed by them.

Why do we not do a test to children before they receive a vaccination to learn if they will be adversely affected by it? They do it for pets, but not people?