offspring

Pedestrians walk along a shopping street after the Austrian government placed roughly two million people who are not fully vaccinated against the coronavirus disease (Covid-19) on lockdown, in Vienna, Austria, November 15, 2021. Photo :Reuters
Coronavirus chronicle

Delta dominates the world, but scientists watch for worrisome offspring

The Delta variant, first detected in India in December 2020, remains the most worrisome version of the SARS-CoV-2 virus