After US health authorities said measles was no longer a major threat, rates of infection fell nationwide. But they're now back up again, mirroring an increase in global rates. The World Health Organization is reporting a 300-percent rise in cases worldwide this month, as compared with the first three months of last year. Al Jazeera's Mike Hanna reports from Washington, DC. Subscribe to our channel: http://aje.io/AJSubscribe Follow us on Twitter: / ajenglish Find us on Facebook: / aljazeera Check our website: https://www.aljazeera.com/ #CDC #US_MeaslesOutbreak #Health