>> Emily Schmall and Karan Deep Singh, The New York Times Published: 08 May 2021 10:52 AM BdST Updated: 08 May 2021 10:52 AM BdST FILE -- Adar Poonawalla, chief executive of the Serum Institute, in Pune, India, July 10, 2020. Poonawalla has acknowledged that the Serum Institute alone doesn’t have the capacity to vaccinate India anytime soon, much less shoulder the burden of inoculating the world’s poor, pledges he made earlier in the pandemic. (Atul Loke/The New York Times) Adar Poonawalla made big promises. The 40-year-old chief of the world’s largest vaccine maker pledged to take a leading role in the global effort to inoculate the poor against COVID-19. His India-based empire signed deals worth hundreds of millions of dollars to make and export doses to suffering countries.