Covid-19 shot, aiming to have 100 million doses ready by December for an inoculation drive that could begin across India that same month.If final-stage trial data show AstraZeneca’s candidate gives effective protection from the virus, the Serum Institute of India Ltd. -- which is partnered to produce at least one billion doses -- may get emergency authorization from New Delhi by December, said Adar Poonawalla, chief executive officer of the family-owned firm based in the Pune.That initial amount will go to India, Poonawalla said in an interview on Thursday.