Britain approved Pfizer’s Covid-19 vaccine on Wednesday, jumping ahead of the rest of the world in the race to begin the most crucial mass inoculation programme in history with a shot tested in wide-scale clinical trials.

India Today spoke to immunologist V Moorthy on the latest development. Can the vaccine provide full protection in any form from the novel coronavirus? Hear out Dr Vasee Moorthy's response. For more, watch the full video.