US President Donald Trump speaks after signing an executive order calling for more research and flexibility on vaccines, alongside US Secretary of Health and Human Services Robert F. Kennedy Jr. (R) and Jayme Leagh Franklin (L), founder of The Conservateur, in the Oval Office of the White House in Washington, DC, on August 10, 2026. Trump signed an executive order Monday pushing for a rethink of school vaccine mandates and repeating calls for the measles-mumps-rubella vaccine to be separated into three individual shots. Curbing vaccines has been a key priority for Health Secretary Robert F. Kennedy Jr, who founded an anti-vaccine nonprofit and has long promoted a disproven link between immunization and autism. (Photo by Jim WATSON / AFP via Getty Images)

WASHINGTON, DC - AUGUST 10: U.S. President Donald Trump, accompanied by (L-R) National Institutes of Health Director Jay Bhattacharya, Jayme Leagh Franklin with the The Conservateur, and Health and Human Services Secretary Robert F. Kennedy Jr., speaks after Trump signed an executive order calling for childhood vaccine shots to be spaced out into separate visits during an event in the Oval Office of the White House on August 10, 2026 in Washington, DC. (Photo by Anna Moneymaker/Getty Images)

WASHINGTON, DC - AUGUST 10: U.S. President Donald Trump, accompanied by (L-R) National Institutes of Health Director Jay Bhattacharya, Jayme Leagh Franklin with the The Conservateur, Health and Human Services Secretary Robert F. Kennedy Jr., and Deputy Assistant to the President for Domestic Policy Dr. Heidi Overton, takes a question from reporters after Trump signed an executive order calling for childhood vaccine shots to be spaced out into separate visits during an event in the Oval Office of the White House on August 10, 2026 in Washington, DC. (Photo by Anna Moneymaker/Getty Images)

US President Donald Trump speaks after signing an executive order calling for more research and flexibility on vaccines, alongside US Secretary of Health and Human Services Robert F. Kennedy Jr. (R) and Jayme Leagh Franklin (L), founder of The Conservateur, in the Oval Office of the White House in Washington, DC, on August 10, 2026. Trump signed an executive order Monday pushing for a rethink of school vaccine mandates and repeating calls for the measles-mumps-rubella vaccine to be separated into three individual shots. Curbing vaccines has been a key priority for Health Secretary Robert F. Kennedy Jr, who founded an anti-vaccine nonprofit and has long promoted a disproven link between immunization and autism. (Photo by Jim WATSON / AFP via Getty Images)

US President Donald Trump looks on before signing an executive order calling for more research and flexibility on vaccines, in the Oval Office of the White House in Washington, DC, on August 10, 2026. Trump signed an executive order Monday pushing for a rethink of school vaccine mandates and repeating calls for the measles-mumps-rubella vaccine to be separated into three individual shots. Curbing vaccines has been a key priority for Health Secretary Robert F. Kennedy Jr, who founded an anti-vaccine nonprofit and has long promoted a disproven link between immunization and autism. (Photo by Jim WATSON / AFP via Getty Images)

US President Donald Trump speaks before signing an executive order calling for more research and flexibility on vaccines, in the Oval Office of the White House in Washington, DC, on August 10, 2026. Trump signed an executive order Monday pushing for a rethink of school vaccine mandates and repeating calls for the measles-mumps-rubella vaccine to be separated into three individual shots. Curbing vaccines has been a key priority for Health Secretary Robert F. Kennedy Jr, who founded an anti-vaccine nonprofit and has long promoted a disproven link between immunization and autism. (Photo by Jim WATSON / AFP via Getty Images)

WASHINGTON, DC - AUGUST 10: U.S. President Donald Trump, accompanied by (L-R) White House Deputy Chief of Staff and Homeland Security Advisor Stephen Miller, National Institutes of Health Director Jay Bhattacharya, Jayme Leagh Franklin with the The Conservateur, and Health and Human Services Secretary Robert F. Kennedy Jr., signs an executive order calling for childhood vaccine shots to be spaced out into separate visits during an event in the Oval Office of the White House on August 10, 2026 in Washington, DC. (Photo by Anna Moneymaker/Getty Images)

US President Donald Trump speaks before signing an executive order calling for more research and flexibility on vaccines, in the Oval Office of the White House in Washington, DC, on August 10, 2026. (Photo by Jim WATSON / AFP via Getty Images)