600 million people worldwide have already received at least one dose of the COVID-19 vaccine, but about 75% of those doses were given in only ten countries. Dr. Soumya Swaminathan, Chief Scientist at the World Health Organization, explains why the pandemic will not effectively end even in the world's richest nations until it is curtailed in its poorest. "A new variant that is less susceptible to the immunity that's brought about by vaccines or that's more transmissible or makes people more ill could easily then spread, in fact, to people in parts of the world where there have been large numbers of people vaccinated and where they think that they are then immune." Dr. Swaminathan discusses the urgent need to distribute vaccines worldwide in an interview with Ian Bremmer on GZERO World, airing on US public television stations starting April 9. Check local listings.

Watch the episode: Vaccine nationalism could prolong the pandemic