India Starts World's Largest COVID-19 Vaccination Drive

NEW DELHI — India started inoculating health workers Saturday in what is likely the world’s largest COVID-19 vaccination campaign, joining the ranks of wealthier nations where the effort is already well underway.

India is home to the world’s largest vaccine makers and has one of the biggest immunization programs. But there is no playbook for the enormity of the current challenge.

Indian authorities hope to give shots to 300 million people, roughly the population of the U.S...