anti-vaxxer
noun/ˌænti ˈvæksə(r)/
/ˌænti ˈvæksər/, /ˌæntaɪ ˈvæksər/
(informal)- a person who is opposed to vaccination
- The outbreak of measles has been blamed on anti-vaxxers who refuse to vaccinate their kids.
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anti-vaxxer