At what age should the first dose of the COMVAX be administered?

The first dose of COMVAX, which is a combination vaccine that protects against Haemophilus influenzae type b (Hib) and hepatitis B (HBV), should be administered at 2 months of age. This timing aligns with the immunization schedules recommended by the Centers for Disease Control and Prevention (CDC) and other health authorities. Administering the vaccine at this age helps ensure that infants receive protection against these serious infections when they are most vulnerable, as their maternal antibodies may begin to wane.

The other options provided do not reflect the correct timing for the first dose of COMVAX. While the 6-week age is when some vaccines may be administered, COMVAX specifically is recommended for 2 months of age. Similarly, 12 months is outside the recommended window for the first dose, as by this age, children would typically receive booster doses. The 4 months option is also incorrect because that is the time for subsequent doses in the vaccination schedule, rather than the initiation of the series. This understanding is critical for maintaining effective immunization practices.