Scientists have warned that a mutation called D614G in the Spike protein region of the SARS-CoV-2 virus — which causes Covid-19 — “is of urgent concern,” as it makes the virus more contagious. And, in this context, an analysis of 82 strains of the virus in India by India-born Prof SS Vasan and his colleagues from the Commonwealth Scientific and Industrial Research Organisation (CSIRO) in Australia, has shown that nearly 50% of them have the new mutation, while globally, nearly two-thirds of all strains have displayed this mutation.