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مشاهدة النسخة كاملة : Coronavirus: R number 'lower than thought' before lockdown eased in England


BECKHAM
15-07-2020, 10:32 AM
A study of 120,000 volunteers in England also suggests those aged 18 to 24 were more likely to test positive.

for more .... (https://www.bbc.co.uk/news/uk-53414363)