The group was chosen by Health Secretary Robert F. Kennedy Jr. amid controversy over their credentials. It's considering making changes to the MMRV vaccine guidance among others.

The CDC’s Advisory Committee on Immunization Practices, made up of officials appointed by Health and Human Services Secretary Robert F. Kennedy Jr., voted on Thursday to stop recommending the combined measles, mumps, rubella and varicella (MMRV) vaccine to children under the age of 4.

Also on Wednesday, Newsom signed a new law, which will shift the immunization recommendations the state will recommend from the CDC to independent medical organizations that include the American Academy of Family Physicians (AAFP), American Academy of Pediatrics (AAP) and the American College of Obstetricians and Gynecologists (ACOG).

Health Secretary Robert F. Kennedy Jr. chose everyone in the group. Their votes could affect vaccine access for certain childhood vaccines and and the COVID shots. Here's what's at stake.

On Thursday, an advisory CDC panel that develops vaccine guidance met for a two-day discussion on multiple childhood vaccines. During the meeting, which was underway as The Checkup went to press, members of the panel were set to discuss those vaccines and propose recommendations on their use.

A two-day meeting of the CDC's Advisory Committee on Immunization Practices, with new members appointed by RFK Jr., could reshape public trust in childhood vaccines and reduce access.

"I have many that won't speak about vaccines now and have removed their names off of papers," said former CDC chief medical officer Debra Houry.

Former Centers for Disease Control and Prevention Director Susan Monarez is expected to testify Wednesday that Health Secretary Robert F. Kennedy Jr. fired her after she refused to endorse new vaccine recommendations before reviewing scientific evidence to support the guidance.