Omicron sub-variants BA.4, BA.5 make up more than 50% of U.S. COVID cases – CDC
(Reuters) – The fast-spreading BA.4 and BA.5 sub-variants of Omicron are estimated to make up a combined 52% of the coronavirus cases in the United States as of June 25, the U.S.…
WHO says it is analysing two new Omicron COVID sub-variants
By Jennifer Rigby (Reuters) – The World Health Organization said on Monday it is tracking a few dozen cases of two new sub-variants of the highly transmissible Omicron strain of the coronavirus…
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