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新型コロナウイルスワクチンのバイアル内の白色浮遊物について｜報道発表資料｜厚生労働省

https://www.mhlw.go.jp/stf/newpage_21115.html

April 10, 2026 at 03:01 AM JST•The archive page, viewer, and downloads use this saved version.

April 10, 2026 at 03:01 AM JST·www.mhlw.go.jp

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新型コロナウイルスワクチンのバイアル内の白色浮遊物について｜報道発表資料｜厚生労働省

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Original URLhttps://www.mhlw.go.jp/stf/newpage_21115.html

StartedApril 10, 2026 at 03:01 AM JST

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This page is a press release from Japan's Ministry of Health, Labour and Welfare dated September 15, 2021, regarding white particulates found in vials of Pfizer's COVID-19 vaccine "Comirnaty." The white microparticles are a product characteristic and the vaccine can be used safely after dilution with 10 gentle inversions. If white particles remain after dilution, that vial should not be used. Product-derived white particles pose no safety concerns, and no foreign substances have been identified. Investigation results for lot number FF5357 will be published promptly.

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