US Secretary of Health and Human Services Robert F. Kennedy Jr. (R) speaks 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)

US Secretary of Health and Human Services Robert F. Kennedy Jr. (R) looks on as 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)

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)

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)

US Secretary of Health and Human Services Robert F. Kennedy Jr. (R) looks on as 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)

US Secretary of Health and Human Services Robert F. Kennedy Jr. (R) looks on as 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)

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)

US Secretary of Health and Human Services Robert F. Kennedy Jr. (R) looks on as 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)