Believing that Vaccines cause death and Autism
(which they do NOT)

Someone too dumb to believe in science, and still believes vaccines cause autism even though it was disproved years ago

Short for anti-vaccination, a.k.a. anti-science basically. People who are antivax think their 'mommy instincts' are more reliable than actual medical evidence that vaccinating your babies actually helps them not dying or getting really sick.... and that vaccinations can give you autism. Which is apparently worde than dying, so they are against vaccination.
Some people have semi-legitimate reasons die it though; for instance not 100% trusting Big Pharma. Or just scepticism in general. Which isn't wrong in itself.... but it becomes a problem when they bring other people in danger nu carrying diseases lol.

A mental illness where a person without reason or neurological processes thinks vaccinations cause autism

someone who is going to die very soon

A term created by the pharmaceutical industry to combat people who question the safety and necessity of vaccines

Opposing vaccines and vaccination.