India is launching what could be the world’s largest vaccination campaign. But it’s unclear if one of the vaccines works. The Washington PostLive Covid-19 News and Updates The New York TimesGlobal immunisation: low-income countries rush to access Covid vaccine supply The GuardianMassive Inoculation Drive Starts in India Despite Vaccine Doubts BloombergIndia to kick off one of the world's largest Covid vaccination drives this weekend CNBCView Full Coverage on Google News