www.mhlw.go.jp/stf/newpage_27929.html

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オミクロン株対応ワクチンの効能・効果、用法・用量の一部変更承認について｜厚生労働省

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https://www.mhlw.go.jp/stf/newpage_27929.html

About this page

This page announces the approval of partial changes to the efficacy, effects, usage, and dosage of Omicron variant-adapted vaccines by Japan's Ministry of Health, Labour and Welfare on September 12, 2022. Pfizer's "Comirnaty RTU" and Moderna's "Spikevax" vaccines have been approved for expanded use to include formulations containing mRNA encoding spike proteins of both the original strain and Omicron variant. Both vaccines are approved for booster immunization, with a minimum interval of 5 months between doses, though future shortening of this interval is being considered.