Immunization Schedules for Infants and children

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Today, children in the United States routinely get vaccines that protect them from more than a dozen diseases such as measles, polio, and tetanus. Most of these diseases are now at their lowest levels in history, thanks to years of immunization. Children must get at least some vaccines before they may attend school.

The recommended immunization schedule below is designed to protect infants and children early in life, when they are most vulnerable and before they are exposed to potentially life-threatening diseases.Check the schedule for the age or age range when each vaccine or series of shots is recommended.

These recommendations must be read with the footnotes that follow. For those who fall behind or start late, provide catch-up vaccination at the earliest opportunity as indicated by the green bars in tables below. To determine minimum intervals between doses, see the catch-up schedule. School entry and adolescent vaccine age groups are 4-6 yrs and 11-12 yrs.

Birth to 15 Months
Vaccine Birth 1 mo 2 mos 4 mos 6 mos 9 mos 12 mos 15 mos
Hepatitis B1 (HepB) ←1st dose→ ←2nd dose→ ←3rd dose→
Rotavirus2(RV)          RV1 (2-dose series); RV5 (3-dose series) ←1st dose→ ←2nd dose→ See footnote 2
Diphtheria, tetanus, & acellular pertussis3(DTaP: <7 yrs) ←1st dose→ ←2nd dose→ ←3rd dose→ ←4th dose→
Tetanus, diphtheria, & acellular         pertussis4 (Tdap: ≥7 yrs)
Haemophilus influenzae type b5 (Hib) ←1st dose→ ←2nd dose→ See footnote 5 ←3rd or 4th dose,          See footnote 5
Pneumococcal conjugate6 (PCV13) ←1st dose→ ←2nd dose→ ←3rd dose→ ←4th dose→
Pneumococcal polysaccharide6(PPSV23)
Inactivated poliovirus7 (IPV)(<18 yrs) ←1st dose→ ←2nd dose→ ←3rd dose→
Influenza8(IIV; LAIV)         2 doses for some: See footnote 8 Annual vaccination (IIV only)
Measles, mumps, rubella9         (MMR) ←1st dose→
Varicella10 (VAR) ←1st dose→
Hepatitis A11 (HepA) ←2 dose series, See footnote 11
Human papillomavirus12         (HPV2: females only; HPV4: males and females)
Meningococcal13 (Hib-Men-CY ≥ 6 weeks; MenACWY-D≥9 mos; MenACWY-CRM ≥ 2 mos) See footnote 13
Range of recommended ages for all children Range of recommended ages for catch-up immunization Range of recommended ages for certain high-risk groups Range of recommended ages during which catch-up is encouraged and for certain high-risk groups Not routinely recommended

18 Months to 18 Years
Vaccines 18 mos 19-23 mos 2-3 yrs 4-6 yrs 7-10 yrs 11-12 yrs 13-15 yrs 16-18 yrs
Hepatitis B1 (HepB) ←3rd dose→
Rotavirus2(RV)          RV1 (2-dose series); RV5 (3-dose series)
Diphtheria, tetanus, & acellular pertussis3(DTaP: <7 yrs) ←4th dose→ ←5th dose→
Tetanus, diphtheria, & acellular         pertussis4 (Tdap: ≥7 yrs) (Tdap)
Haemophilus influenzae type b5 (Hib)
Pneumococcal conjugate6 (PCV13)
Pneumococcal polysaccharide6(PPSV23)
Inactivated poliovirus7 (IPV)(<18 yrs) ←3rd dose→ ←4th dose→
Influenza8(IIV; LAIV)         2 doses for some: See footnote 8 Annual vaccination (IIV only) Annual vaccination (IIV or LAIV)
Measles, mumps, rubella9         (MMR) ←2nd dose→
Varicella10 (VAR) ←2nd dose→
Hepatitis A11 (HepA) ←2 dose series, See footnote 11
Human papillomavirus12         (HPV2: females only; HPV4: males and females) ←(3 dose series)→
Meningococcal13 (Hib-Men-CY ≥ 6 weeks; MenACWY-D≥9 mos; MenACWY-CRM ≥ 2 mos) See footnote 13 ←1st dose→ Booster

Note: The above recommendations must be read along with the footnotes of this schedule.