More than 8,500 U.S. schools at greater risk of measles outbreaks as vaccination rates decline
Over time there have been ups and downs in efforts to get rid of measles. Just this month, there were cases in multiple U.S. cities, including outbreaks around Philadelphia and in Washington state. Experts agree that measles can easily spread among unvaccinated people.
Right now, at least a third of the United States is at risk.