The claim
万博を訪れた子どもたち、肺炎で学級閉鎖が相次ぐ?
Original review summary
The review reports that the insecticide used at the Expo did not contain Legionella and that detected bacteria levels did not exceed the stated guideline value. It also says there was no evidence that school closures in Osaka were more frequent than usual.[S1]
Research date:
Sources and attribution
- [S1] 日本ファクトチェックセンター(JFC) original review
Original review · Retrieved October 16, 2026