During the coronavirus disease 2019 (Covid-19) pandemic, the emergence of the BA.1, BA.2, and BA.3 sublineages of the B.1.1.529 (omicron) variant of severe acute respiratory syndrome coronavirus 2 ...
The emergence of two variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) — B.1.1.7 in the United Kingdom and B.1.351 in South Africa — has aroused concern that these variants may ...
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