WHO says omicron BA.4 and BA.5 subvariants have spread to over a dozen countries
Another omicron subvariant called BA.2.12.1 has been detected in 23 countries, including the U.S., according to WHO. U.S. News
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Another omicron subvariant called BA.2.12.1 has been detected in 23 countries, including the U.S., according to WHO. U.S. News