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W.H.O. says the BA.2 subvariant of Omicron is driving most cases around the world.


By BY ALYSSA LUKPAT from NYT World
W.H.O. says the BA.2 subvariant of Omicron is driving most cases around the world. W.H.O. says the BA.2 subvariant of Omicron is driving most cases around the world.

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