NEW DELHI â The coronavirus pandemic is a âwake up callâ for governments to invest more in health care, says Adar Poonawalla, CEO of the Serum Institute of India, the worldâs largest manufacturer of vaccines. The Serum Institute has taken on a vital role as the largest company licensed to manufacture the Oxford University-AstraZeneca coronavirus vaccine. It is increasing its production capacity by the end of 2021 to over 2.5 billion doses a year to cope with future disease outbreaks, Poonawalla said in a telephone interview with The Associated Press. Poonawallaâs company now has an annual capacity of 1.5 billion doses. That is more than the billion doses that China, home to the most vaccine makers in the world, says it manufactures in a year.