The Trump administration is slashing long-standing areas of research funded by the National Institutes of Health, claiming they no longer align with the agency’s priorities.

The latest target?

Millions of dollars in NIH grants for studying vaccine hesitancy and how to improve immunization levels. It’s work that’s particularly relevant as a measles outbreak grips the Southwest amidst diminishing vaccination rates.

In recent weeks, scientists around the country have begun receiving letters stating their existing grants — money already awarded to them in a competitive process — were being cut.