What immunization is routinely given at birth?

The Hepatitis B vaccine is routinely given at birth because it plays a crucial role in preventing the transmission of the virus from an infected mother to her newborn. Administering this vaccine as one of the first immunizations helps establish early immunity against Hepatitis B, which can lead to serious liver disease later in life if contracted. The timing of the vaccine is essential; receiving it within 24 hours of birth is recommended, especially if the mother has a known Hepatitis B infection.

In contrast, the MMR vaccine, which protects against measles, mumps, and rubella, is not given until 12 months of age due to the interference with maternal antibodies. The DTP vaccine (diphtheria, tetanus, and pertussis) generally starts at 2 months of age, and the polio vaccine is also introduced later in infancy. Therefore, the Hepatitis B vaccine is uniquely positioned as the only vaccine routinely administered at birth.