A key federal vaccine advisory panel whose members were recently replaced by Health Secretary Robert F. Kennedy Jr. is expected to vote to recommend delaying, until age 4, the hepatitis B vaccine that’s currently given to newborns, according to two former senior officials at the Centers for Disease Control and Prevention.

For more than 30 years, the CDC has advised that infants get the first of three shots of the hepatitis B vaccine at birth. In that time, the potentially fatal disease has been virtually eradicated among American children. Between 1990 and 2022, case rates plummeted 99 percent among people age 19 and younger.

Pediatricians warn that waiting until age 4 to begin vaccination opens the door to more children contracting the virus.