US President Donald Trump signs 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. (Photo by Jim WATSON / AFP via Getty Images)

WASHINGTON, DC - AUGUST 10: Jayme Leagh Franklin with The Conservateur (L), stands behind U.S. President Donald Trump (R), before he 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. During his second term, Trump has urged Health and Human Services Secretary Robert F. Kennedy Jr. to investigate further research on vaccines. (Photo by Anna Moneymaker/Getty Images)

US Secretary of Health and Human Services Robert F. Kennedy Jr. (R) and Jayme Leagh Franklin (L), founder of The Conservateur, look on before President Donald Trump signs 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)

WASHINGTON, DC - AUGUST 10: National Institutes of Health Director Jay Bhattacharya attends an event before U.S. President Donald Trump 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. During his second term, Trump has urged Health and Human Services Secretary Robert F. Kennedy Jr. to investigate further research on vaccines. (Photo by Anna Moneymaker/Getty Images)

WASHINGTON, DC - AUGUST 10: National Institutes of Health Director Jay Bhattacharya (L), accompanied by Jayme Leagh Franklin (2nd-R) with the The Conservateur, and U.S. President Donald Trump (R), speaks before Trump 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. During his second term, Trump has urged Health and Human Services Secretary Robert F. Kennedy Jr. to investigate further research on vaccines. (Photo by Anna Moneymaker/Getty Images)

WASHINGTON, DC - AUGUST 10: Health and Human Services Secretary Robert F. Kennedy Jr. (2nd-R), accompanied by (L-R) National Institutes of Health Director Jay Bhattacharya, Jayme Leagh Franklin with the The Conservateur, U.S. President Donald Trump, and Deputy Assistant to the President for Domestic Policy Dr. Heidi Overton (R), speaks before Trump 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)

WASHINGTON, DC - AUGUST 10: National Institutes of Health Director Jay Bhattacharya (L), accompanied by U.S. President Donald Trump (2nd-R), and Jayme Leagh Franklin (R) with the The Conservateur, speaks before Trump 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. During his second term, Trump has urged Health and Human Services Secretary Robert F. Kennedy Jr. to investigate further research on vaccines. (Photo by Anna Moneymaker/Getty Images)

WASHINGTON, DC - AUGUST 10: White House Deputy Chief of Staff and Homeland Security Advisor Stephen Miller attends an event before U.S. President Donald Trump 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. During his second term, Trump has urged Health and Human Services Secretary Robert F. Kennedy Jr. to investigate further research on vaccines. (Photo by Anna Moneymaker/Getty Images)