Doctors worry that President Donald Trump’s new executive order on vaccines will stoke fear and confusion among parents at a time when measles is raging, immunization rates are falling and children are heading back to school.

The update comes just days after Harris County confirmed its first measles case, but officials say it's not connected to any local cases in the Greater Houston area.

An adult who was infected with measles has died in New Mexico, though the virus has not been confirmed as the cause.

Kentucky's largest city has been praised for managing to raise childhood vaccination rates at a time when may places are trying to prevent further declines.