摘要

Investigation of all 243 cases of COVID-19 reported in Singapore during January 23-March 16 identified seven clusters of cases in which presymptomatic transmission is the most likely explanation for the occurrence of secondary cases.

詳細內容

Investigation of all 243 cases of COVID-19 reported in Singapore during January 23-March 16 identified seven clusters of cases in which presymptomatic transmission is the most likely explanation for the occurrence of secondary cases.

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萃取時間: 2026-02-05T15:15:54Z 資料來源: CDC MMWR