Delta coronavirus variant believed to have 60% transmission advantage - UK epidemiologist

The Delta coronavirus variant of concern, first identified in India, is believed to be 60% more transmissible than the Alpha variant which was previously dominant in Britain, a prominent UK epidemiologist said on Wednesday. British Prime Minister Boris Johnson has said that England's full reopening from COVID-19 lockdown, pencilled in for June 21, could be pushed back due to the rapid spread of the Delta variant.