Covid-19 vaccination programmes across Africa and much of the developing world will suffer big delays after India, the worlds biggest vaccine producer, said that it would not be exporting the Oxford/AstraZeneca vaccine until the end of the year, The Guardian reported. The decision is likely to leave the Covax global vaccine-sharing facility, which helps the poor countries, facing a shortfall of hundreds of millions of doses, the report said. "We continue to scale up manufacturing and prioritise India. We also hope to start delivering to Covax and other countries by the end of this year," Adar Poonawalla, the chief executive of Serum Institute of India (SII), said on Tuesday.