Everything you need to know about omicron strains BA.4 and BA.5 - Deseret News

‘It’s a serious threat,’ Dr. David Ho, a professor of microbiology and immunology at Columbia University, said about the new omicron strains, BA.4 and BA.5

New COVID-19 infections may be declining in some states, like Michigan and Vermont, but a challenging summer lies ahead as new omicron variants worry experts. Driving the news: Subvariants BA.4 and… [+2401 chars]

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