A leading White House coronavirus expert warned on Sunday that the rising number of cases in the US was making it harder to determine how people were contracting the virus, intensifying concern over people attending large events around the country.
白宮一名領先的冠狀病毒專家周日警告稱，美國的新冠病例越來越多，加大了確定感染方式的難度，此言加劇了人們對于參加全美各地大型活動的擔憂。
您已閱讀7%（315字），剩余93%（4527字）包含更多重要信息，訂閱以繼續探索完整內容，并享受更多專屬服務。