Dr. Drew Weissman, who won the Nobel prize for his work on developing the tech that helped to create the COVID-19 mRNA vaccines, brought tears of joy to his parents when he broke the news. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': bit.ly/3mscXkB WATCH OTHER FULL EPISODES OF WORLD NEWS TONIGHT: abc.go.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: bit.ly/3iQLwPp #nobelprize #covid19 #weissman #wnt #abcnews