Indulekha Aravind | 17:59 Min | November 24, 2020, 2:18 PM IST
Bharat Biotech failed to halt clinical trials after one person developed serious side-effects during the testing of Covaxin, its indigenously developed Covid-19 vaccine candidate. Dr. Srinath Reddy, President of Public Health Foundation of India, and ET’s Teena Thacker take us through the protocols and challenges of developing a vaccine.