Someone who rejects medical advice and
scientific consensus about the efficacy and safety of
vaccinations. Typically pairs with anti-government paranoia, anti-corporate sentiment,
conspiracy theories, and the "appeal to nature" fallacy. Anti-vaxxers also spawned the movement of autism-trutherism, which claims that autism is caused as a response to adjuvants found in vaccinations.
While there are several common schools of thought among anti-vaxxer circles, specific claims will often change about why vaccinations are harmful. The anti-vaxxer will single out benign ingredients as being particularly toxic regardless of its concentration, or sometimes that inoculation itself is a sham practice and was never necessary. Many anti-vaxxers instead champion "natural immunity," which involves actually contracting the disease that is vaccinated against in hope that they will be less susceptible to it in the future.
Tactics often include the "argument from ignorance," the "appeal to nature," and "begging the question."