Delta variant primary cause behind India's second Covid wave: Expert panel

A study by ​​The Indian SARS-CoV-2 Consortium on Genomics (INSACOG) said the Delta variant, first found in India, is the "primary cause" behind the second Covid-19 wave. "​B.1.617 variant & its lineage B.1.617.2 were primarily responsible for surge in cases with high transmissibility of 50% more than Alpha variant (B.1.1.7)," said the study.