The claim
麻疹流行「ワクチンは危険、自分で罹って免疫獲得」 「ワクチンで自閉症
Original review summary
The review concludes that measles is highly contagious and can be fatal, while vaccination is highly effective at preventing it. It also says that deliberately catching measles to gain immunity is dangerous and that the claim linking measles vaccination to autism is false; the paper that prompted that claim was withdrawn.[S1]
Additional context
The review reports that a single vaccine dose produces immunity in 93–95% or more of recipients, and two doses in 97–99% or more. [S1]
It describes measles as potentially fatal and says that intentionally getting infected to gain immunity is not recommended. [S1]
Research date:
Sources and attribution
- [S1] 日本ファクトチェックセンター original review
Original review · Retrieved October 16, 2026