WASHINGTON, DC - AUGUST 10: Health and Human Services Secretary Robert F. Kennedy Jr. (L), and Deputy Assistant to the President for Domestic Policy Dr. Heidi Overton (R), stand in the Oval Office after U.S. President Donald Trump signed an executive order calling for childhood vaccine shots to be spaced out into separate visits at the White House on August 10, 2026 in Washington, DC. (Photo by Anna Moneymaker/Getty Images)