摘要

This report describes evidence suggesting that limited U.S. community transmission of COVID-19 likely began in late January or early February 2020, after a single importation from China, followed by multiple importations from Europe.

詳細內容

This report describes evidence suggesting that limited U.S. community transmission of COVID-19 likely began in late January or early February 2020, after a single importation from China, followed by multiple importations from Europe.

關鍵發現

(需要透過 WebFetch 補充或人工審核來提取關鍵發現)

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萃取時間: 2026-02-05T15:15:43Z 資料來源: CDC MMWR