WHO: Biến thể “Omicron tàng hình” có thể lây lan mạnh toàn cầu
Tổ chức Y tế thế giới (WHO) ngày 8/2 nhận định số ca mắc biến thể dòng phụ BA.2 của Omicron, hay còn gọi là " Omicron tàng hình ," sẽ gia tăng trên phạm vi toàn cầu, dù giới khoa học hiện vẫn chưa biết liệu biến thể phụ này có khả năng gây tái nhiễm ở người từng mắc Omicron hay không.
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