Measles, one of the world’s most contagious diseases, was declared eliminated in the US in 2000, due to widespread use of the measles-mumps-rubella vaccine.

The Supreme Court issued an order Tuesday allowing the Trump administration to move forward with restructuring federal agencies through executive power.

Supreme Court backs Trump's federal workforce reduction plans, overturning lower court injunction. Thousands of government ...

This is not the first time the rare hantavirus has been traced to a National Park, as there were cases in people who had visited Yosemite National Park in 2012.

Pediatricians say their key concern is that after Robert Kennedy Jr. fired the government’s top vaccine experts and appointed replacements, the U.S. may ultimately stop calling for the vaccines' use.