Measles cases in the US have reached 704 in 22 states – the highest mark in 25 years, reports USA Today.

It is the highest total of US measles cases since 1994; the previous highest total since 2000 was 667 cases in 2014. At no other point in this century did the amount climb above 400.

This year’s surge in cases largely is among unvaccinated people in New York City, suburban Rockland County, New York, and Washington state.

This century’s record was hit as of April 26, which means the US figure will only increase even if outbreaks slow in some communities.