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Omicron BA.2 subvariant now accounts for a quarter of all new COVID cases in US
Omicron BA.2 sub-variant nearly a quarter of new COVID cases in U.S.
Doctors say subvariant of Omicron - BA.2 accounts for about a quarter of reported cases
Omicron subvariant, BA.2
COVID variant BA.2 drives case surge worldwide
Omicron BA.2 Subvariant Gains Ground in U.S.
Omicron sub-variant BA.2 is now the dominant strain of coronavirus in Scotland
Rise in Omicron subvariant BA.2 cases coinciding with allergy season
Latest COVID-19 omicron sub-variant to thank for rising cases nationwide
COVID-19 omicron subvariant, BA.2
BA.2 subvariant cases increase
What Mayo Clinic COVID-19 experts know about new omicron BA.2 subvariant
