What are the key immunizations in the childhood vaccination schedule?

The childhood vaccination schedule includes hepatitis B starting at birth, rotavirus at 2 and 4 months, diphtheria-tetanus-pertussis or DTaP at 2, 4, 6, and 15 to 18 months with a booster at 4 to 6 years, Haemophilus influenzae type b or Hib at 2, 4, and 12 to 15 months, pneumococcal conjugate at 2, 4, 6, and 12 to 15 months, inactivated poliovirus at 2, 4, 6 to 18 months, and 4 to 6 years, measles-mumps-rubella or MMR at 12 to 15 months and 4 to 6 years, and varicella at 12 to 15 months and 4 to 6 years. Live vaccines like MMR and varicella are contraindicated in immunocompromised children.