For several weeks, health professionals, political leaders and even the World Health Organization have been saying that people do not need to use protective face masks unless they are sick or caring for someone with Covid-19. But now a lot of them them are backtracking from the advice and recommending people to wear masks all the time. Today on our call in show on NDTV, a lot of callers had questions regarding face masks and if it can prevent one from coronvavirus? What kind of masks should one use? Are masks reusable? Watch our call in show if you have the same concerns.