A young child in Lubbock, Texas, receives the measles vaccine earlier this year while his mother holds him. | Jan Sonnenmair/Getty Images Dr. Andrew Carroll, a family physician in Chandler, Arizona, a suburb outside of Phoenix, first arrived there in 2000, the same year the United States declared measles had been eradicated. Now, 25 years later, an outbreak is accelerating a couple hours away from his practice — only the latest in a number of troubling outbreaks across the United States this year as vaccination rates tumble. Key takeaways Doctors say they are frustrated and overw...

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