Dr D. Nageshwar Reddy, founder of the Asian Institute of Gastroenterology in Hyderabad, has put together a 52-member team to study the second wave of the Covid pandemic in India. They came up with a treatment protocol and administered it on 20,000 critical patients. Almost all of them were saved. Reddy tells M.S. Shanker that India could overcome the pandemic by this year-end. Excerpts…