If he is confirmed as secretary of health and human services, the longtime vaccine critic would be in a position to change the government’s immunisation recommendations and delay the development of new vaccines. For years, Robert F. Kennedy Jr, has leveraged his famous name, his celebrity connections and his nonprofit, Children’s Health Defence, to spread misinformation about vaccines and call their safety and efficacy into question.

Soon, he might have the power to go much further. If Kennedy is confirmed by the Senate to be Secretary of Health and Human Services, he would be in charge of the nation’s preeminent public health and scientific agencies, including those responsible for regulating vaccines and setting national vaccine policy. Legal and public health experts agree he would not have the authority to take some of the most severe actions, such as unilaterally banning vaccines, which Kennedy has said he has no intention of doing.

“I’m not going to take anyone’s vaccines away from them,” he wrote on social media last month. “I just want to be sure every American knows the safety profile, the risk profile, and the efficacy of each vaccine.”.