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The 2026 Childhood Vaccine Schedule, Explained by Age
A plain-language walkthrough of routine immunizations from birth through adolescence and why the timing is what it is.
By Rezia Divaker, MDJuly 23, 2026Medically reviewed July 23, 2026
The immunization schedule can look overwhelming on paper. Here is what happens at each stage and the reasoning behind the timing our practice follows.
Birth through 6 months
- Hepatitis B at birth, with follow-up doses in the first months.
- DTaP, Hib, polio, pneumococcal, and rotavirus at 2, 4, and 6 months.
- RSV protection and maternal vaccination help shield the youngest infants.
12 months through preschool
- MMR, varicella, and hepatitis A begin around the first birthday.
- Booster doses of DTaP, Hib, and pneumococcal complete early protection.
- A second MMR and varicella dose and a DTaP booster occur at 4 to 6 years.
Adolescents
- Tdap, meningococcal, and HPV vaccination around 11 to 12 years.
- Meningococcal booster at 16 years.
- Annual influenza vaccine every year from 6 months of age.
Why the timing matters
Doses are scheduled for the ages when children are most vulnerable and when their immune systems respond best. Delaying doses leaves a window of risk without any proven benefit.
When to call Divaker Pediatrics
Our Mount Dora office is here for questions big and small. Call 352-383-8386 to schedule a visit, or use the healow patient portal to send a message to our team. If your child has a medical emergency, call 911.