Why India just might pull off ‘the world’s largest vaccination program’

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India will launch its nationwide COVID-19 vaccination program on Saturday. Within eight months, it plans to vaccinate 300 million people—nearly equivalent to the entire U.S. population. And that’s just the first phase of the country’s coronavirus vaccination drive that will eventually extend to India’s nearly 1.4 billion people.

India is the second-most populous country in the world...