The Advisory Committee on Immunization Practices also voted to recommend a shot to protect travelers from a mosquito-borne illness called chikungunya.

But it’s not clear who will decide whether to accept those recommendations.

The 15-member expert panel makes recommendations to the director of the Centers for Disease Control and Prevention on how regulator-cleared vaccines should be used. CDC directors almost always approve the recommendations.

The Trump administration named Susan Monarez as acting CDC director in January, and last month picked her to lead the agency. But while she’s awaiting Senate confirmation, she has essentially recused herself from regular duties because of federal law around vacancies, according to two CDC officials speaking on condition of anonymity because they were not authorized to discuss agency matters and feared being fired.