Why has there been a resurgence of measles around the world despite being preventable by vaccine? The US officially eliminated measles nearly 20 years ago. Yet, in 2019, more than 1,100 cases have been reported. In partnership with The Forum at Harvard's T.H. Chan School of Public Health, The World's Elana Gordon moderated a live discussion looking at the drivers of the 2019 outbreaks on Thursday, Sept. 12.