Omicron BA.4, BA.5 sub-variants found in over a dozen countries: WHO
Omicron BA.4, BA.5 sub-variants found in over a dozen countries: WHO Omicron subvariants BA.4 and BA.5 have been detected in more than a dozen countries driving Covid outbreaks across the world, according to the World Health Organization. https://ift.tt/X0jS6yW
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