Global vaccination efforts are underway to prevent people from getting and spreading COVID-19. World Health Organization officials have called for collective commitment so that within the next 100 days, vaccination for health workers and those at high-risk in all countries is in process. But concerns over the pace of distribution, access and efficacy persist. What do you need to know now, and what will be the most pressing issues as vaccination efforts unfold around the world?

Guests: 
Eric Ding, 
senior fellow, Federation of American Scientists;

Chen Hong, 
East China Normal University