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Delta variant of Covid spreading rapidly and detected in 74 countries
Concerns over impact on poorer countries, while richer governments try different containment measures
The Delta variant of Covid-19, first identified in India, has been detected in 74 countries and continues to spread rapidly amid fears that it is poised to become the dominant strain worldwide.
Outbreaks of the Delta variant have been confirmed in China, the US, Africa, Scandinavia and the Pacific. Scientists report that it appears to be more transmissible, as well as causing more serious illness.