Article
First detection of SARS‐CoV‐2 Omicron BA.4 variant in Western Pennsylvania, United States
10 May 2022
Abstract excerpt
At the time of writing, the world continues to witness the extraordinarily rapid evolution and selection of SARS-CoV-2, with the Omicron variants comprising five lineages known as BA.1, BA.2, BA.3, BA.4, and BA.5.1 The Omicron variant shows a large number of mutations leading to amino-acid changes, which are widely distributed on many structural and nonstructural regions of SARS-CoV-2.2 The spike protein of the...
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