Definition of anti-vax in US English:

anti-vax

adjective

informal
  • Opposed to vaccination.

    ‘anti-vax parents’
    • ‘I am not here to convince the anti-vax champions regarding the merits of vaccination.’
    • ‘Anti-vax sentiments have, in fact, been around since Edward Jenner first demonstrated the effectiveness of the smallpox vaccine in the late 18th century.’
    • ‘One of the things the anti-vax crowd insists upon is that the spread of cleanliness in the US and Europe, and not vaccines, is what stopped polio, measles and other communicable diseases.’
    • ‘The anti-vax movement was recently reinvigorated by a small British study in 1998 that linked the MMR vaccine with autism.’
    • ‘A recent focus group showed that parents were more likely to accept information about vaccines when the source was other parents than if the information came from authorities, thus illustrating the power of anti-vax groups run by parents.’
    • ‘One doctor isn't afraid to point a finger right at the anti-vax movement.’
    • ‘After the anti-vax lobbying effort, he said that he could hardly remember his illness.’
    • ‘My co-author and I would love to help parents understand why anti-vax claims are wrong.’
    • ‘In a survey of anti-vax parents the US journal Pediatrics found that they typically make their decision based upon a mound of books and source material.’
    • ‘Growing numbers of malcontents, the anti-vax campaigners, allied increasingly with the Tea Party movement in the US, detest their government's directives on vaccination.’

Origin

Late 19th century (as anti-vacc): from anti- + an abbreviation of vaccination (see vax).

Pronunciation

anti-vax

/ˌan(t)īˈvaks/