The Advisory Committee on Immunization Practices (ACIP) annually publishes a recommended immunization schedule for persons aged 0-18 years to reflect changes in vaccine formulations and current recommendations for the use of licensed vaccines. Changes to the previous schedule (1) are as follows:
- The pneumococcal conjugate vaccine (PCV) footnote reflects updated recommendations for incompletely vaccinated children aged 24-59 months, including those with underlying medical conditions (2). - Recommendations for use of the live attenuated influenza vaccine (LAIV) now include healthy children aged as young as 2 years. LAIV should not be administered to children aged <5 years with recurrent wheezing (3). Children aged <9 years who are receiving influenza vaccine for the first time or who were vaccinated for the first time last season, but only received 1 dose, should have 2 doses of vaccine, at least 4 weeks apart. Other updates are included (4). - For meningococcal vaccines, changes affect certain children aged 2-10 years (5). Vaccinating with meningococcal conjugate vaccine (MCV4) is preferred to meningococcal polysaccharide vaccine (MPSV4) for children at increased risk for meningococcal disease, including children who are traveling to or residents of countries in which the disease is hyperendemic or epidemic, children who have terminal complement component deficiencies, and children who have anatomic or functional asplenia. The catch-up schedule for youths aged 13-18 years has been updated. MPSV4 is an acceptable alternative for shortterm (i.e., 3-5 years) protection against meningococcal disease for persons aged 2-18 years (6). - The tetanus and diphtheria toxoids/tetanus and diphtheria toxoids and acellular pertussis vaccine (Td/Tdap) catch-up schedule for persons aged 7-18 years who received their first dose before age 12 months now indicates that these youths should receive 4 doses, with at least 4 weeks (not 8 weeks) between doses 2 and 3. - The catch-up bars for hepatitis B and Haemophilus influenzae type b conjugate vaccine have been deleted on the routine schedule for persons aged 0-6 years (Figure 1). The figure title refers users to the catch-up schedule (

# PPV
Administration for that dose of the series. Providers should consult the respective Advisory Committee on Immunization Practices statement for detailed recommendations, including for high-risk conditions: / pubs/acip-list.htm. Clinically significant adverse events that follow immunization should be reported to the Vaccine Adverse Event Reporting System (VAERS). Guidance about how to obtain and complete a VAERS form is available at . vaers.hhs.gov or by telephone, 800-822-7967.

# Hepatitis B vaccine (HepB). (Minimum age: birth)
At birth:
- Administer monovalent HepB to all newborns before hospital discharge.
- If mother is hepatitis surface antigen (HBsAg)-positive, administer HepB and 0.5 mL of hepatitis B immune globulin (HBIG) within 12 hours of birth. - If mother's HBsAg status is unknown, administer HepB within 12 hours of birth.
Determine the HBsAg status as soon as possible and if HBsAg-positive, administer HBIG (no later than age 1 week). - If mother is HBsAg-negative, the birth dose should only be delayed, in rare cases, with health-care-provider's order and a copy of the mother's negative HBsAg laboratory report documented in the infant's medical record.

# After the birth dose:
- The HepB series should be completed with either monovalent HepB or a combination vaccine containing HepB. The second dose should be administered at age 1-2 months. The final dose should be administered no earlier than age 24 weeks. Infants born to HBsAg-positive mothers should be tested for HBsAg and antibody to HBsAg after completion of at least 3 doses of a licensed HepB series, at age 9-18 months (generally at the next well-child visit).

# 4-month dose:
- It is permissible to administer 4 doses of HepB when combination vaccines are administered after the birth dose. If monovalent HepB is used for doses after the birth dose, a dose at age 4 months is not needed.

# Rotavirus vaccine (Rota). (Minimum age: 6 weeks)
- Administer the first dose at age 6-12 weeks.
- Do not start the series later than age 12 weeks.
- Administer the final dose in the series by age 32 weeks. Do not administer a dose later than age 32 weeks. - Data on safety and efficacy outside of these age ranges are insufficient.

# Diphtheria and tetanus toxoids and acellular pertussis vaccine (DTaP).
(Minimum age: 6 weeks)
- The fourth dose of DTaP may be administered as early as age 12 months, provided 6 months have elapsed since the third dose. - Administer the final dose in the series at age 4-6 years.

# Haemophilus influenzae type b conjugate vaccine (Hib).
(Minimum age: 6 weeks)
- If PRP-OMP (PedvaxHIB  or ComVax  
) is administered at ages 2 and 4 months, a dose at age 6 months is not required. - TriHiBit  (DTaP/Hib) combination products should not be used for primary immunization but can be used as boosters after any Hib vaccine in children aged >12 months.

# Pneumococcal vaccine. (Minimum age: 6 weeks for pneumococcal conjugate vaccine ; 2 years for pneumococcal polysaccharide vaccine )
- Administer 1 dose of PCV to all healthy children aged 24-59 months having any incomplete schedule. - Administer PPV to children aged >2 years with underlying medical conditions.

# Influenza vaccine. (Minimum age: 6 months for trivalent inactivated influenza vaccine ; 2 years for live, attenuated influenza vaccine )
- Administer annually to children aged 6-59 months and to all eligible close contacts of children aged 0-59 months. - Administer annually to children aged >5 years with certain risk factors, to other persons (including household members) in close contact with persons in groups at higher risk, and to any child whose parents request vaccination. - For healthy persons (i.e., those who do not have underlying medical conditions that predispose them to influenza complications) aged 2-49 years, either LAIV or TIV may be used. - Children receiving TIV should receive 0.25 mL if aged 6-35 months or 0.5 mL if aged >3 years. - Administer 2 doses (separated by >4 weeks) to children aged <9 years who are receiving influenza vaccine for the first time or who were vaccinated for the first time last season but only received 1 dose.

# Measles, mumps, and rubella vaccine (MMR). (Minimum age: 12 months)
- Administer the second dose of MMR at age 4-6 years. MMR may be administered before age 4-6 years, provided >4 weeks have elapsed since the first dose.

# Varicella vaccine. (Minimum age: 12 months)
- Administer the second dose of varicella vaccine at age 4-6 years; may be administered >3 months after first dose. - Do not repeat second dose if administered >28 days after first dose.

# Hepatitis A vaccine (HepA). (Minimum age: 12 months)
- Administer to all children aged 1 year (i.e., aged 12-23 months). Administer the 2 doses in the series at least 6 months apart. - Children not fully vaccinated by age 2 years can be vaccinated at subsequent visits.
- HepA is recommended for certain other groups of children, including in areas where vaccination programs target older children.

# Meningococcal vaccine. (Minimum age: 2 years for meningococcal conjugate vaccine  and for meningococcal polysaccharide vaccine )
- Administer MCV4 to children aged 2-10 years with terminal complement deficiencies or anatomic or functional asplenia and certain other high-risk groups. MPSV4 also is acceptable. - Administer MCV4 to persons who received MPSV4 >3 years previously and remain at increased risk for meningococcal disease. Q-3

# Human papillomavirus vaccine (HPV). (Minimum age: 9 years)
- Administer the first dose of the HPV vaccine series to females at age 11-12 years.
- Administer the second dose 2 months after the first dose and the third dose 6 months after the first dose. - Administer the HPV vaccine series to females at age 13-18 years if not previously vaccinated.

# Meningococcal vaccine.
- Administer meningococcal conjugate vaccine (MCV4) at age 11-12 years and at age 13-18 years if not previously vaccinated. Meningococcal polysaccharide vaccine (MPSV4) is an acceptable alternative. - Administer MCV4 to previously unvaccinated college freshmen living in dormitories. - MCV4 is recommended for children aged 2-10 years with terminal complement deficiencies or anatomic or functional asplenia and certain other groups at high risk.
- Persons who received MPSV4 >3 years previously and remain at increased risk for meningococcal disease should be vaccinated with MCV4.

# Pneumococcal polysaccharide vaccine (PPV).
- Administer to certain groups at high risk.

# Influenza vaccine.
- Administer annually to all close contacts of children aged 0-59 months.
- Administer annually to person with certain risk factors, health-care workers, and other persons (including household members) in close contact with persons in groups at higher risk. - Administer 2 doses (separated by >4 weeks) to children aged <9 years who are receiving influenza vaccine for the first time or who were vaccinated for the first time last season but only received 1 dose. - For healthy nonpregnant persons (i.e., those who do not have underlying medical conditions that predispose them to influenza complications) aged 2-49 years, either LAIV or TIV may be used. 6. Hepatitis A vaccine (HepA).
- Administer 2 doses in the series at least 6 months apart.
- HepA is recommended for certain other groups of children, including in areas where vaccination programs target older children.

# Hepatitis B vaccine (HepB).
- Administer the 3-dose series to those who were not previously vaccinated.
- A 2-dose series of Recombivax HB  is licensed for children aged 11-15 years.

# Inactivated poliovirus vaccine (IPV).
- For children who received an all-IPV or all-oral poliovirus (OPV) series, a fourth dose is not necessary if the third dose was administered at age >4 years. - If both OPV and IPV were administered as part of a series, a total of 4 doses should be administered, regardless of the child's current age. 9. Measles, mumps, and rubella vaccine (MMR).
- If not previously vaccinated, administer 2 doses of MMR during any visit, with >4 weeks between the doses. 10. Varicella vaccine.
- Administer 2 doses of varicella vaccine to persons aged 28 days after the first dose. - Administer 2 doses of varicella vaccine to persons aged >13 years at least 4 weeks apart.
- Administer the 3-dose series to those who were not previously vaccinated.
- A 2-dose series of Recombivax HB  is licensed for children aged 11-15 years.

# Rotavirus vaccine (Rota).
- Do not start the series later than age 12 weeks.
- Administer the final dose in the series by age 32 weeks.
- Do not administer a dose later than age 32 weeks.
- Data on safety and efficacy outside of these age ranges are insufficient.

# Diphtheria and tetanus toxoids and acellular pertussis vaccine (DTaP).
- The fifth dose is not necessary if the fourth dose was administered at age >4 years.
- DTaP is not indicated for persons aged >7 years.

# Haemophilus influenzae type b conjugate vaccine (Hib).
- Vaccine is not generally recommended for children aged >5 years.
- If current age <12 months and the first 2 doses were PRP-OMP (PedvaxHIB  or ComVax  ), the third (and final) dose should be administered at age 12-15 months and at least 8 weeks after the second dose. - If first dose was administered at age 7-11 months, administer 2 doses separated by 4 weeks plus a booster at age 12-15 months.

# Pneumococcal conjugate vaccine (PCV).
- Administer 1 dose of PCV to all healthy children aged 24-59 months having any incomplete schedule. - For children with underlying medical conditions, administer 2 doses of PCV at least 8 weeks apart if previously received <3 doses or 1 dose of PCV if previously received 3 doses.

# Inactivated poliovirus vaccine (IPV).
- For children who received an all-IPV or all-oral poliovirus (OPV) series, a fourth dose is not necessary if third dose was administered at age >4 years.
- If both OPV and IPV were administered as part of a series, a total of 4 doses should be administered, regardless of the child's current age. - IPV is not routinely recommended for persons aged >18 years.

# Measles, mumps, and rubella vaccine (MMR).
- The second dose of MMR is recommended routinely at age 4-6 years but may be administered earlier if desired. - If not previously vaccinated, administer 2 doses of MMR during any visit with >4 weeks between the doses. 8. Varicella vaccine.
- The second dose of varicella vaccine is recommended routinely at age 4-6 years but may be administered earlier if desired. - Do not repeat the second dose in persons aged 28 days after the first dose. 9. Hepatitis A vaccine (HepA).
- HepA is recommended for certain groups of children, including in areas where vaccination programs target older children. See MMWR 2006;55(No. RR-7).

# Tetanus and diphtheria toxoids vaccine (Td) and tetanus and diphtheria toxoids and acellular pertussis vaccine (Tdap).
- Tdap should be substituted for a single dose of Td in the primary catch-up series or as a booster if age appropriate; use Td for other doses. - A 5-year interval from the last Td dose is encouraged when Tdap is used as a booster dose. A booster (fourth) dose is needed if any of the previous doses were administered at age <12 months. See MMWR 2006;55(No. RR-3).

# Human papillomavirus vaccine (HPV).
- Administer the HPV vaccine series to females at age 13-18 years if not previously vaccinated.
The table below provides catch-up schedules and minimum intervals between doses for children whose vaccinations have been delayed. A vaccine series does not need to be restarted, regardless of the time that has elapsed between doses. Use the section appropriate for the child's age.