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an·ti-vax | \ ˌan-tē-ˈvaks, ˌan-ˌtī- 
\
\Definition of anti-vax
: anti-vaccination Aggressive anti-vax campaigns claiming that vaccines are unsafe and can lead to autism—a theory long disproven—drive much of the vaccine hesitancy worldwide.— Lily Hyde
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The first known use of anti-vax was in 1996
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