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Omicron ‘sister variants’ account for 35% of US cases: 4 COVID-19 updates

BA.4 and BA.5 now account for nearly 35 percent of U.S. cases, according to the CDC's latest variant proportion update. The strains have become known as "sister variants" of the original omicron strain. 

Read the full post at Becker's Hospital Review - Healthcare News
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