Federal health officials have been instructed to temporarily stop any “external communications” to the public, according to two officials with knowledge of the situation.

The agencies are charged with making decisions that touch the lives of every American and are the source of crucial information to health-care providers.

President Donald Trump is pulling the U.S. out of the World Health Organization, raising concerns about the U.N. agency's ability to fight diseases and respond to emergencies around the globe without its biggest funder.