@e123 https://www.cdc.gov/vaccines/parents/by-age/newborn-birth.html#:~:text=Hepatitis%20B%20(HepB)&text=Mothers%20can%20unknowingly%20pass%20the,within%2024%20hours%20of%20birth.&text=If%20you%20have%20hepatitis%20B,within%2012%20hours%20of%20birth.