COVID-19 vaccine Covishield by Serum Institute: How effective is it? How much will it cost?

- 'Covishield is highly effective vaccine against novel coronavirus,' said Adar Poonawalla, chief executive officer, Serum Institute of India
- The first 100 million doses of Covishield were being sold to the Indian government at a special price of ₹200, Poonawalla said