The 2-billion Vaccine Question: How realistic are estimates and what's the current status? SECTIONS Share Synopsis The Centre’s plan for 2 billion doses of Covid-19 vaccines by year-end depends on a massive ramp-up of production as well as flawless trials, approval and manufacturing of five new vaccines. How realistic are the estimates? In what stages are the new vaccines now? AP Amid a shortage of Covid-19 vaccines, which has seen many states suspend inoculation sessions, the Centre on May 13 announced that 2 billion doses would be available by the end of the year. This would be a signi...