The State Department is taking over much of the control of global health initiatives, for which critics say the department does not have the expertise.
The health secretary is trying to restart the work of a panel that advises the government on vaccines, after a judge froze its decisions and prevented it from meeting.
Health Secretary Robert F. Kennedy Jr. during a House hearing in April. Last June, he fired all 17 members of a vaccine advisory committee and named new ones, many of whom share his skepticism of vaccines.