The Centers for Disease Control and Prevention on Monday confirmed 880 cases of measles in 2019, marking the worst year for the disease in America in 25 years. Health officials have now confirmed cases in 24 states, with 41 new cases in the last week alone. Thirty of those new cases were reported in New York. Despite the total number continuing to rise, a CDC spokesperson told CNBC the pace of the disease appears to be slowing down. Officials continue to attribute the recent surge of cases, which was declared eliminated from the U.S. in 2000, to an increasing number of parents who refuse to vaccinate their children. The CDC said Monday there are several outbreaks in progress across the country, but the majority of cases are concentrated in two outbreaks in New York City and New York’s Rockland County. The newest state to declare a measles case is Oklahoma, where a person contracted the measles after traveling domestically and internationally.