More than a billion vaccines have been administered. But the contrast between Israel, largely free of covid-19, and India, struggling with a catastrophic second wave, is stark. What explains the discrepancy?    

Devi Sridhar, Founding Director of the Global Health Governance Programme, tells us what to expect as the next billion vaccines roll out. 

Alok Jha and Natasha Loder are joined by Slavea Chankova, The Economist’s health-care correspondent, and technology correspondent Hal Hodson. Anshel Pfeffer reports from Israel.

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