The number of measles cases this calendar year has jumped to 465, the Centers for Disease Control and Prevention announced yesterday.

By the numbers: This the second-highest number of cases reported since the disease was eliminated in 2000. Cases have been confirmed in 19 states, but the spread is mostly accelerating due to an outbreak in New York City, according to WSJ.

Go deeper: U.S. measles cases mount as anti-vaccine influence goes unchecked