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WHO's Europe chief said autumn and winter would pose a "tricky situation" with schools reopening, the onset of the flu season and increased mortality among older people in winter months in general.
Consistent efforts to increase air quality over the last 20 years are paying off.
Dr Tedros said such allegations are "untrue and unacceptable" and warned against politicising the coronavirus pandemic.
Eastern Congo has also marked an official end to the second-deadliest Ebola outbreak in history
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