BioNTech-Pfizer vaccines could be available as early as Christmas this year, says BioNTech Chief Executive Ugur Sahin.The US Food and Drug Administration might grant emergency-use approval towards the end of the first half of December or early in the second half, the BioNTech Chief Executive added.Speaking to Reuters TV, Ugur Sahin said, "If all goes well I could imagine that we gain approval (from US FDA) in the second half of December and start deliveries before Christmas, but really only if all goes positively."Meanwhile, as the race for Covid-19 vaccine heats up, the World Health Organization's emergencies director warned saying that vaccines would not arrive in time to defeat the second wave of the novel coronavirus pandemic.Here is.