The United Kingdom, South Africa and Brazil variants of the coronavirus might be responsible for the current severe third wave of Covid-19 in Pakistan, says a recent study.
The study, which analysed 3,501 positive samples, found that these variants were responsible for causing 54 per cent of new Covid-19 infections reported from December 2020 to February 2021 in Karachi.
According to the study, the positivity ratio in the months of September to November 2020 was 1.538pc, which jumped to 7.6pc in December 2020 to February 2021.
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