Delta strain becomes dominant variant in US

The highly transmissible Delta strain has overtaken the Alpha variant to become the dominant variant in the US, according to new estimates from the US Centers for Disease Control and Prevention (CDC).

Delta, which was first found in India and is now in over 100 countries, represented 51.7 per cent of new infections in the US over the two weeks ending July 3, Xinhua news agency reported citing the CDC.

Meanwhile, the proportion of new cases caused by Alpha, which was first detected in Britain, was just 28.7 per cent over the same time period, according to the CDC.

Recently, health officials and experts have warned that the Delta variant was on track to become the dominant variant in the US, as its prevalence in the nation doubles about every two weeks.

They are concerned the variant will cause a surge in new cases this fall, hitting the unvaccinated population the hardest.

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