RINA CHANDRAN  AS COVID-19 vaccines are rolled out worldwide, a push for identity proofs and digital certificates risks excluding poorer and vulnerable groups from vaccination and the benefits that come with it, according to rights experts. India announced guidelines this week for the first phase of vaccinations for about 300 million people, requiring eligible recipients to first register online with photo-identity documents, including the Aadhaar digital ID. Meanwhile, the International Air Transport Association (IATA), the lobby group of the world's airlines, said it would launch a digital health travel pass early next year that will include passengers' COVID-19 vaccination data. But insisting on a…