A 40-year-old woman has died from measles complications in Pennsylvania, marking the state's third measles-associated death this year as the U.S. experiences its worst resurgence of the highly contagious disease in 35 years. The woman, a Jefferson County resident, died on Saturday, county Coroner Greg Furlong said on Facebook. "This is a heartbreaking loss for the family and an unfortunate reminder that measles can be a serious and potentially life-threatening disease," Furlong said.