A policeman watches as an aircraft from India carrying the Oxford-AstraZeneca vaccine made by India’s Serum Institute, arrives at the Tribhuvan International Airport in Kathmandu on Thursday. (Prakash Mathema/AFP/Getty Images)

NEW DELHI — India started vaccinating its own population against the coronavirus only a few days ago, but it is already using its manufacturing heft to generate goodwill with its neighbors.

India’s government has made the calculation that it has enough vaccine doses to share. The result is a form of vaccine diplomacy that appears to be unlike any other in the world.