(NewsNation) — As Health and Human Services Secretary Robert F. Kennedy Jr. shakes up vaccine policy in the U.S., doubt has been cast on whether certain vaccines are safe and effective.

The latest vaccine under scrutiny by Kennedy and his newly formed vaccine panel is the hepatitis B vaccine. During the first meeting of the Centers for Disease Control and Prevention's Advisory Committee on Immunization Practices (ACIP), the chair questioned whether it was a good decision to give the vaccine to newborns. Current CDC guidance calls for newborns to receive their first hep B shot at birth.

Experts with both the CDC and the Hepatitis B Foundation have said the vaccine is safe and effective.

What is hepatitis B?

Hepatitis B is a liver infection caused by the hepatitis B virus. The virus is t

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