By BY ADEEL HASSAN from NYT Health https://ift.tt/wUX4jn0
The Omicron subvariants BA.4 and BA.5 have together become dominant in the U.S., the C.D.C. estimates.
By BY ADEEL HASSAN from NYT Health https://ift.tt/wUX4jn0
By BY ADEEL HASSAN from NYT Health https://ift.tt/wUX4jn0
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