Guidelines from the Advisory Committee on Immunization Practices help physicians decide what vaccines to recommend to patients and are also used for determining insurance coverage in the U.S. The country's health regulator has approved three vaccines for RSV — GSK's Arexvy,

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.