RFK Jr. would also have the power, along with the FDA commissioner, to slow down or hamper the process by which new vaccines are evaluated, approved, and recommended. That could discourage pharmaceutical companies from developing new or reformulated vaccines.

President-elect Donald Trump tapped vaccine skeptic Robert F. Kennedy Jr. to lead the agency tasked with improving the health of the country, potentially granting him influence over the foods and drugs that affect the daily lives of Americans.