The claim
インフルエンザワクチン「フルミスト」は劇薬だから危険?
Original review summary
The review explains that “劇薬” designation means a medicine requires careful handling and does not, by itself, mean the vaccine is dangerous. It notes that FluMist is not recommended for certain people, including those with mitochondrial encephalomyopathy, who are advised to use an inactivated influenza vaccine instead.[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