Which vaccines are part of the pediatric immunization schedule at 18 months?

The pediatric immunization schedule recommends several vaccines to be administered at 18 months of age, and the correct choice includes DTaP (diphtheria, tetanus, and pertussis), Hib (Haemophilus influenzae type b), IPV (inactivated poliovirus), and MMR (measles, mumps, and rubella). These vaccinations play a crucial role in preventing serious, potentially life-threatening diseases among children.

DTaP protects against diphtheria, tetanus, and pertussis, which can lead to severe respiratory issues in young children. Hib vaccination is vital in preventing bacterial meningitis and severe pneumonia. IPV protects against poliomyelitis, a viral infection that can cause paralysis. Lastly, the MMR vaccine is essential for preventing three major viral infections that can lead to serious complications in children.

The vaccines listed in the other choices do not align with the typical immunization schedule for 18-month-olds, focusing instead on different age recommendations or combinations that are not given at this specific age. For instance, hepatitis A and influenza vaccines are usually given later, while the varicella and HPV vaccines are typically administered at different ages altogether. The meningococcal and pneumococcal