By MIKE STOBBE and LAURA UNGAR Associated Press

ATLANTA (AP) — Health Secretary Robert F. Kennedy Jr.’s new vaccine advisory committee met Thursday to begin weighing changes to guidance on shots against COVID-19, hepatitis B and chickenpox.

The morning’s discussion focused on a combination vaccine called MMRV, which protects against measles, mumps, rubella and chickenpox, which is also known as varicella.

The advisers planned to vote later Thursday on a proposal to recommend that the shot not be given to children younger than 4 because of rare instances of feverish seizures associated with the first dose, given to kids between ages 1 and 2.

On Thursday, committee member Dr. Cody Meissner said such seizures may be “a very frightening experience” for families, but medical experts agree t

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