Explainer: All we know about Indian variant of coronavirus that crippled health care system

Scientists suggest that the unexpected surge in the COVID-19 cases which caused the second wave of pandemic leading the Indian health care system to the brink of collapse can be a result of coronavirus variant named B.1.617

source https://zeenews.india.com/india/explainer-all-we-know-about-indian-variant-of-coronavirus-that-crippled-health-care-system-2358558.html