COVID-19 infections were exploding in China well before the government’s decision to abandon its strict “zero-COVID” policy, a World Health Organization director said on Wednesday, quashing suggestions that the sudden reversal caused a spike in cases.
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Japan’s population level immunity to COVID-19 has reached about 90% in major population areas after a recent Omicron wave, though that level of protection is likely to diminish in a matter of months, according to a study published on Tuesday.