A number of other health agencies are also operating without acting heads, including the FDA and the National Institutes of Health.

Scientific researchers around the country are concerned after the National Institutes of Health canceled meetings this week with very little explanation. The move comes after federal health officials were told to halt public communications until they could be reviewed by a Trump appointee.

The new administration has reportedly asked federal health agencies to stop all external communications pending a review.

The Trump administration is expected to tap Susan Coller Monarez, the deputy director of a federal health research agency, to serve as the acting head of the Centers for Disease Control and Prevention,

President Trump ordered a pause on communications from several federal health organizations, including the FDA, the CDC, and the National Institutes of Health.

Scientific meetings were canceled, and research data on the bird flu outbreak was delayed, amid confusion over the directive.

The order also applies to other health and science agencies, including the FDA and the National Institutes of Health.

The Trump administration’s freeze on communications from U.S. health agencies is leading to another disruption: the abrupt cancellation of scientific meetings. The move covers a swath of health conditions,