COVID-19: What to know about Alpha, Beta, Delta, Gamma variants

Delta variant fuels 6 deaths in Lagos daily

The highly contagious Delta variant is fuelling a rise in positivity rate from 1.1 percent at June end to 8.9 percent as of August 1

Several novel coronavirus variants have emerged since 2020 but four of them – Alpha, Beta, Delta, and Gamma - are classified variants of concern for some reasons. The World Health Organisation (WHO) considers them of higher infection rate and more violent against immunity that the effectiveness

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