After federal health officials made abrupt changes to US Covid-19 vaccine recommendations for pregnant women last month, there’s new confusion and uncertainty about who can get the shots — and some reports that patients were turned away when they tried to get vaccinated.

Moderna's shares fell 2.5% before the bell on Friday, on concerns whether a new CDC advisory panel would back the use of the company's respiratory syncytial virus vaccine in a broader age group.

Kennedy's picks circumvented the usual CDC process for selecting members of the Advisory Committee on Immunization Practices. In previous administrations, career agency officials — not political leaders — vetted potential experts before forwarding them to the department for the secretary's approval.

Just two days after retiring the entirety of the US Centers for Disease Control and Prevention’s vaccine advisory panel, US Health and Human Services Secretary Robert F. Kennedy Jr. has appointed several prominent critics of the government’s Covid-19 response to that committee.

U.S. Health and Human Services Secretary Robert F. Kennedy Jr. said on Thursday he promised to allow U.S. Senator Bill Cassidy to pick a candidate for a key panel of vaccine advisers.

We're replacing BBC Sounds outside the UK and bringing you BBC.com, a seamless way to read, watch, and listen - all in one place.

The health secretary cited financial conflicts, but a White House official and someone familiar with his thinking said he was also concerned about ties to Democrats.

One of the new vaccine advisers picked by U.S. Health Secretary Robert F. Kennedy Jr. has earned thousands of dollars as an expert witness in litigation against Merck’s Gardasil vaccine, court records show.