Which of the following vaccines is not typically included in the childhood immunization schedule?

The rabies vaccine is not typically included in the standard childhood immunization schedule because it is primarily given in specific circumstances, rather than as a routine vaccine for all children. The rabies vaccine is usually administered after potential exposure to the virus, such as through bites from rabid animals, rather than being part of a preventive immunization program for the general pediatric population.

In contrast, vaccines like DTaP (diphtheria, tetanus, and pertussis), MMR (measles, mumps, and rubella), and polio are standard vaccinations that children receive to protect against common and potentially serious infectious diseases. These vaccines are scheduled to be administered at specific ages to ensure that the population remains immune to these diseases.