6/28/2022 The Omicron subvariants BA.4 and BA.5 have together become dominant in the U.S. the C.D.C. estimates.Read Now
The milestone comes less than six months since they were first detected in South Africa, and as the federal government considers an Omicron-specific booster dose for adults in the fall.
Via https://www.nytimes.com/2022/06/28/health/covid-subvariants-ba4-ba5.html
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