BA.2 trở thành biến thể chủ đạo gây bệnh COVID-19 trên toàn cầu

Dòng phụ BA.2 của biến thể Omicron của virus SARS-CoV-2 hiện là nguyên nhân chính gây ra các ca mắc COVID-19 trên toàn cầu, đặc biệt tại châu Âu và châu Á, làm gia tăng lo ngại về khả năng bùng phát một đợt dịch mới tại Mỹ.

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b2gwd8Otc8O6dDBlw6FvaDB1w63hu4FxMHXhu6dkMGjhuqXDvTBp4bqjw60uMG9p4bqndTBt4bqhMGXhu5PDrTB34budw60wb2l2b2gwb2jhu6nhu6PDrTBkaeG7qcOhMHXDreG6v24wcWnhu41vaDB34bqhMG9pw7JuMMSRZjBj4buJMHXhu5dvMHVp4bup4bubb2ghPi9xez5xMGRtw6F0dCQgccOBw7p1acOzcyB7VWnDqcOzMFPDqcO6dcOpc3Q+L3F7

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