US pharmaceutical giant Pfizer announced a deal to make its prospective antiviral Covid-19 pill available more cheaply in the world's least wealthy countries. Pfizer will sub-licence production of its promising Paxlovid pill to generic drug manufacturers for supply in 95 low-and middle-income nations covering around 53 per cent of the world's population. NDTV spoke to leading medical experts on what this means for India and whether this will be a true game-changer in fight against COVID-19.