Backup diff of COVID-19/Delta (No. 1)

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  • 1 (2022-08-13 (Sat) 22:45:33)

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- インドから広がったデルタ型変異ウイルス　感染力、重症化リスク、ワクチンの効果について
--  https://news.yahoo.co.jp/byline/kutsunasatoshi/20210711-00247279