Childhood vaccination schedule

Vaccination Main Page

Childhood vaccination schedule

Overview

Childhood Vaccination Schedule

Catch-up Immunization

Specific Conditions

Additional Information and Footnotes

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1];Associate Editor(s)-in-Chief: Seyedmahdi Pahlavani, M.D. [2]

## Overview

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Vaccination is one of the best ways parents can protect infants, children and teens from 16 potentially harmful diseases. Vaccine-preventable diseases can be very serious, may require hospitalization, or even be deadly especially in infants and young children. Vaccines help develop immunity by imitating an infection. This type of infection, however, does not cause illness, but it does cause the immune system to produce T-lymphocytes and antibodies. Sometimes, after getting a vaccine, the imitation infection can cause minor symptoms, such as fever. Such minor symptoms are normal and should be expected as the body builds immunity. Once the imitation infection goes away, the body is left with a supply of “memory” T-lymphocytes, as well as B-lymphocytes that will remember how to fight that disease in the future. However, it typically takes a few weeks for the body to produce T-lymphocytes and B-lymphocytes after vaccination. Therefore, it is possible that a person who was infected with a disease just before or just after vaccination could develop symptoms and get a disease, because the vaccine has not had enough time to provide protection. We describe the vaccination schedule for childhood and early adulthood here.

## Childhood vaccination schedule

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The following table summarizes the vaccination schedule for Adolescents Aged 18 Years or Younger based on CDC 2017 recommendation.

Vaccine  | Birth  | 1 mo  | 2 mos  | 4 mos  | 6 mos  | 9 mos  | 12 mos  | 15 mos  | 18 mos  | 19-23 mos  | 2-3 yrs  | 4-6 yrs  | 7-10 yrs  | 11-12 yrs  | 13-15 yrs  | 16 yrs  | 17-18 yrs

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Hepatitis B1 (Hep B)  | 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  |  | 5th dose  |  |  |  |  |
Haemophilus influenzae type b4 (Hib)  |  |  | 1st dose  | 2nd dose  | See footnote 4  |  | 3rd or 4th dose,

See footnote 4

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Pneumococcal conjugate5 (PCV13)  |  |  | 1st dose  | 2nd dose  | 3rd dose  |  | 4th dose  |  |
Inactivated poliovirus6 (IPV: <18 yrs)  |  |  | 1st dose  | 2nd dose  | 3rd dose  |  | 4th dose  |
Influenza7 (IIV)  |  |  |  |  | Annual vaccination (IIV) 1 or 2 doses  | Annual vaccination (IIV) 1 dose only
Measles, mumps, rubella8 (MMR)  |  |  |  |  | See footnote 8  | 1st dose  |  | 2nd dose  |
Varicella9 (VAR)  |  |  |  |  |  |  | 1st dose  |  | 2nd dose  |
Hepatitis A10 (Hep A)  |  |  |  |  |  |  | 2-dose series, See footnote 10  |  |  |  |  |  |  |
Meningococcal11 (Hib-MenCY >6 weeks;

MenACWY-D >9 mos; MenACWY-CRM ≥2 mos)

|  |  | See footnote 11  | 1st dose  |  | 2nd dose  |
Tetanus, diphtheria, & acellular pertussis12 (Tdap: >7 yrs)  |  |  |  |  |  |  |  |  |  |  |  |  |  | Tdap  |
Human papillomavirus13 (HPV)  |  |  |  |  |  |  |  |  |  |  |  |  |  | See footnote 13  |
Meningococcal B11 |  |  |  |  |  |  |  |  |  |  |  |  | See footnote 11
Pneumococcal polysaccharide5 (PPSV23)  |  |  |  |  |  |  |  |  |  |  | See footnote 5

| Range of recommended ages for all children

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| Range of recommended ages for catch-up immunization
| No recommendation
| Range of recommended ages for certain high-risk groups

## Catch-up immunization

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Catch-up immunization schedule for persons aged 4 months through 18 years who start late or who are more than 1 month behind.
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. Always use this table in conjunction with above table and the footnotes that follow.

Children age 4 months through 6 years

Vaccine  | Minimum Age for Dose 1  | Minimum Interval Between Doses
Dose 1 to Dose 2  | Dose 2 to Dose 3  | Dose 3 to Dose 4  | Dose 4 to Dose 5
Hepatitis B1 | Birth  | 4 weeks  | 8 weeks

and at least 16 weeks after first dose.

Minimum age for the final dose is 24 weeks.

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Rotavirus2 | 6 weeks  | 4 weeks  | 4 weeks2 |  |
Diphtheria, tetanus, and acellular pertussis3 | 6 weeks  | 4 weeks  | 4 weeks  | 6 months  | 6 months3
Haemophilus influenzae type b4 | 6 weeks  |

* 4 weeks if first dose was administered before the 1st birthday.

* 8 weeks (as final dose) if first dose was administered at age 12 through 14 months.

* No further doses needed if first dose was administered at age 15 months or older.

* 4 weeks4

If current age is younger than 12 months and first dose was administered at younger than age 7 months,

and at least 1 previous dose was PRP-T (ActHib, Pentacel, Hiberix) or unknown.

* 8 weeks

and age 12 through 59 months (as final dose)4

If current age is younger than 12 months and first dose was administered at age 7 through 11 months;

If current age is 12 through 59 months and first dose was administered before the 1st birthday, and second dose administered at younger than 15 months; OR

If both doses were PRP-OMP (PedvaxHIB; Comvax) and were administered before the 1st birthday.

* No further doses needed if previous dose was administered at age 15 months or older.

* 8 weeks (as final dose)

This dose only necessary for children age 12 through 59 months who received 3 doses before the 1st birthday.

Pneumococcal5 | 6 weeks  |

* 4 weeks if first dose administered before the 1st birthday.
* 8 weeks (as final dose for healthy children) if first dose was administered at the 1st birthday or after.
* No further doses needed for healthy children if first dose was administered at age 24 months or older.

* 4 weeks if current age is younger than 12 months and previous dose given at <7 months old.
* 8 weeks (as final dose for healthy children) if previous dose given between 7-11 months (wait until at least 12 months old); OR if current age is 12 months or older and at least 1 dose was given before age 12 months.
* No further doses needed for healthy children if previous dose administered at age 24 months or older.

* 8 weeks (as final dose)

This dose only necessary for children aged 12 through 59 months who received 3 doses before age 12 months or for children at high risk who received 3 doses at any age.

Inactivated poliovirus6 | 6 weeks  | 4 weeks6 | 4 weeks6 | 6 months6 (minimum age 4 years for final dose).  |
Measles, mumps, rubella8 | 12 months  | 4 weeks  |  |  |
Varicella9 | 12 months  | 3 months  |  |  |
Hepatitis A10 | 12 months  | 6 months  |  |  |
Meningococcal11 (Hib-MenCY ≥6 weeks; MenACWY-D ≥9 mos; MenACWY-CRM ≥2 mos)  | 6 weeks  | 8 weeks11 | See footnote 11 | See footnote 11 |
Children and adolescents age 7 through 18 years

Vaccine  | Minimum Age for Dose 1  | Minimum Interval Between Doses
Dose 1 to Dose 2  | Dose 2 to Dose 3  | Dose 3 to Dose 4  | Dose 4 to Dose 5
Meningococcal11

(MenACWY-D ≥9 mos; MenACWY-CRM ≥2 mos)

| Not Applicable (N/A)  | 8 weeks11 |  |  |
Tetanus, diphtheria;

Tetanus, diphtheria, and acellular pertussis12

| 7 years12  | 4 weeks  |

* 4 weeks if first dose of DTaP/DT was administered before the 1st birthday.
* 6 months (as final dose) if first dose of DTaP/DT or Tdap/Td was administered at or after the 1st birthday

* 6 months

If first dose of DTaP/DT was administered before the 1st birthday.

Human papillomavirus13 | 9 years  | Routine dosing intervals are recommended.13
Hepatitis A10 | N/A  | 6 months  |  |  |
Hepatitis B1 | N/A  | 4 weeks  | 8 weeks and at least 16 weeks after first dose.  |  |
Inactivated poliovirus6 | N/A  | 4 weeks  | 4 weeks6  | 6 months6  |
Measles, mumps, rubella8 | N/A  | 4 weeks  |  |  |
Varicella9 | N/A  |

* 3 months if younger than age 13 years.
* 4 weeks if age 13 years or older.

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## Specific conditions

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Vaccines that might be indicated for children and adolescents aged 18 years or younger based on medical indications.

VACCINE  | Pregnancy  | Immunocompromised status (excluding HIV infection)  | HIV infection CD4+ count (cells/μL)  | Kidney failure, endstage renal disease, on hemodialysis  | Heart disease, chronic lung disease  | CSF leaks/ cochlear implants  | Asplenia and persistent complement component deficiencies  | Chronic liver disease  | Diabetes

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<15% of total CD4 cell count  | ≥15% of total CD4 cell count
Hepatitis B1 |
Rotavirus2 |  |  |  |
SCID
Diphtheria, tetanus, & acellular pertussis3 (DTaP)  |  |
Haemophilus influenzae type b4 |  |  |  |  |
Pneumococcal conjugate5 |  |  |  |  |
Inactivated poliovirus6 |  |
Influenza7 |
Measles, mumps, rubella8 |  |
Varicella9 |  |
Hepatitis A10 |  |  |  |
Meningococcal ACWY11 |  |  |  |  |  |
Tetanus, diphtheria, & acellular pertussis12 (Tdap)  |  |
Human papillomavirus13 |  |  |
Meningococcal B11 |  |  |  |
Pneumococcal polysaccharide5 |  |
| Vaccination according to the routine schedule recommended

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| Recommended for persons with an additional risk factor for which the vaccine would be indicated
| Vaccination is recommended, and additional doses may be necessary based on medical condition. See footnotes.
| No recommendation
| Contraindicated
| Precaution for vaccination

### Additional information and footnotes

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Vaccine  | Routine vaccination  | Catch-up vaccination  | Vaccination for high risk person

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At birth  | Doses following the birth dose

1. Hepatitis B (Hep B) vaccine

(Minimum age: birth)

* Administer monovalent Hep B vaccine to all new-borns within 24 hours of birth.
* For infants born to hepatitis B surface antigen (HBsAg) positive mothers, administer Hep B vaccine and 0.5 mL of hepatitis B immune globulin (HBIG) within 12 hours of birth. These infants should be tested for HBsAg and antibody to HBsAg (anti-HBs) at age 9 through 12 months (preferably at the next well-child visit) or 1 to 2 months after completion of the Hep B series if the series was delayed.
* If mother’s HBsAg status is unknown, within 12 hours of birth, administer Hep B vaccine regardless of birth weight. For infants weighing less than 2,000 grams, administer HBIG in addition to Hep B vaccine within 12 hours of birth. Determine mother’s HBsAg status as soon as possible and, if mother is HBsAg-positive, also administer HBIG to infants weighing 2,000 grams or more as soon as possible, but no later than age 7 days.

* The second dose should be administered at age 1 or 2 months. Monovalent Hep B vaccine should be used for doses administered before age 6 weeks.
* Infants who did not receive a birth dose should receive 3 doses of a Hep B-containing vaccine on a schedule of 0, 1 to 2 months, and 6 months, starting as soon as feasible.
* Administer the second dose 1 to 2 months after the first dose (minimum interval of 4 weeks); administer the third dose at least 8 weeks after the second dose AND at least 16 weeks after the first dose. The final (third or fourth) dose in the Hep B vaccine series should be administered no earlier than age 24 weeks.
* Administration of a total of 4 doses of Hep B vaccine is permitted when a combination vaccine containing Hep B is administered after the birth dose.

* Unvaccinated persons should complete a 3-dose series.
* A 2-dose series (doses separated by at least 4 months) of adult formulation Recombivax HB is licensed for use in children aged 11 through 15 years.

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2\. Rotavirus (RV) vaccines.

(Minimum age: 6 weeks for both RV1 [Rotarix] and RV5 [RotaTeq])

| Administer a series of RV vaccine to all infants as follows:

1. If Rotarix is used, administer a 2-dose series at ages 2 and 4 months.
2. If RotaTeq is used, administer a 3-dose series at ages 2, 4, and 6 months.
3. If any dose in the series was RotaTeq or vaccine product is unknown for any dose in the series, a total of 3 doses of RV vaccine should be administered.

* The maximum age for the first dose in the series is 14 weeks, 6 days; vaccination should not be initiated for infants aged 15 weeks, 0 days, or older.
* The maximum age for the final dose in the series is 8 months, 0 days.

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3\. Diphtheria and tetanus toxoids and acellular pertussis (DTaP) vaccine.

(Minimum age: 6 weeks. Exception: DTaPIPV [Kinrix, Quadracel]: 4 years)

* Administer a 5-dose series of DTaP vaccine at ages 2, 4, 6, 15 through 18 months, and 4 through 6 years. The fourth dose may be administered as early as age 12 months, provided at least 6 months have elapsed since the third dose.
* Inadvertent administration of fourth DTaP dose early: If the fourth dose of DTaP was administered at least 4 months after the third dose of DTaP and the child was 12 months of age or older, it does not need to be repeated.

| The fifth dose of DTaP vaccine is not necessary if the fourth dose was administered at age 4 years or older.  | \

4\. Haemophilus influenzae type b (Hib) conjugate vaccine.

(Minimum age: 6 weeks for PRP-T [ActHIB, DTaP-IPV/Hib (Pentacel), Hiberix, and Hib-MenCY (MenHibrix)], PRPOMP [PedvaxHIB])

* Administer a 2- or 3-dose Hib vaccine primary series and a booster dose (dose 3 or 4, depending on vaccine used in primary series) at age 12 through 15 months to complete a full Hib vaccine series.
* The primary series with ActHIB, MenHibrix, Hiberix, or Pentacel consists of 3 doses and should be administered at ages 2, 4, and 6 months. The primary series with PedvaxHIB consists of 2 doses and should be administered at ages 2 and 4 months; a dose at age 6 months is not indicated.
* One booster dose (dose 3 or 4, depending on vaccine used in primary series) of any Hib vaccine should be administered at age 12 through 15 months.

* If dose 1 was administered at ages 12 through 14 months, administer a second (final) dose at least 8 weeks after dose 1, regardless of Hib vaccine used in the primary series.
* If both doses were PRP-OMP (PedvaxHIB or COMVAX) and were administered before the first birthday, the third (and final) dose should be administered at age 12 through 59 months and at least 8 weeks after the second dose.
* If the first dose was administered at age 7 through 11 months, administer the second dose at least 4 weeks later and a third (and final) dose at age 12 through 15 months or 8 weeks after second dose, whichever is later.
* If first dose is administered before the first birthday and second dose administered at younger than 15 months, a third (and final) dose should be administered 8 weeks later.
* For un-vaccinated children aged 15–59 months, administer only 1 dose.

* Children aged 12 through 59 months who are at increased risk for Hib disease, including chemotherapy recipients and those with anatomic or functional asplenia (including sickle cell disease), human immunodeficiency virus (HIV ) infection, immunoglobulin deficiency, or early component complement deficiency, who have received either no doses or only 1 dose of Hib vaccine before age 12 months, should receive 2 additional doses of Hib vaccine, 8 weeks apart; children who received 2 or more doses of Hib vaccine before age 12 months should receive 1 additional dose.
* For patients younger than age 5 years undergoing chemotherapy or radiation treatment who received a Hib vaccine dose(s) within 14 days of starting therapy or during therapy, repeat the dose(s) at least 3 months following therapy completion.
* Recipients of hematopoietic stem cell transplant (HSCT) should be re-vaccinated with a 3-dose regimen of Hib vaccine starting 6 to 12 months after successful transplant, regardless of vaccination history; doses should be administered at least 4 weeks apart.
* A single dose of any Hib-containing vaccine should be administered to unimmunized* children and adolescents 15 months of age and older undergoing an elective splenectomy; if possible, vaccine should be administered at least 14 days before procedure.
* Hib vaccine is not routinely recommended for patients 5 years or older. However, 1 dose of Hib vaccine should be administered to unimmunized* persons aged 5 years or older who have anatomic or functional asplenia (including sickle cell disease) and unimmunized* persons 5 through 18 years of age with HIV infection.
* * Patients who have not received a primary series and booster dose or at least 1 dose of Hib vaccine after 14 months of age are considered unimmunized.

5\. Pneumococcal vaccines.

(Minimum age: 6 weeks for PCV13, 2 years for PPSV23)

| Routine vaccination with PCV13:

* Administer a 4-dose series of PCV13 at ages 2, 4, and 6 months and at age 12 through 15 months.

| Catch-up vaccination with PCV13:

* Administer 1 dose of PCV13 to all healthy children aged 24 through 59 months who are not completely vaccinated for their age.

| All recommended PCV13 doses should be administered prior to PPSV23 vaccination if possible.

For children aged 2 through 5 years with any of the following conditions: chronic heart disease (particularly cyanotic congenital heart disease and cardiac failure); chronic lung disease (including asthma if treated with high-dose oral corticosteroid therapy); diabetes mellitus; cerebrospinal fluid leak; cochlear implant; sickle cell disease and other hemoglobinopathies; anatomic or functional asplenia; HIV infection; chronic renal failure; nephrotic syndrome; diseases associated with treatment with immunosuppressive drugs or radiation therapy, including malignant neoplasms, leukemias, lymphomas, and Hodgkin disease; solid organ transplantation; or congenital immunodeficiency:

1. Administer 1 dose of PCV13 if any incomplete schedule of 3 doses of PCV13 was received previously.
2. Administer 2 doses of PCV13 at least 8 weeks apart if unvaccinated or any incomplete schedule of fewer than 3 doses of PCV13 was received previously.
3. The minimum interval between doses of PCV13 is 8 weeks.
4. For children with no history of PPSV23 vaccination, administer PPSV23 at least 8 weeks after the most recent dose of PCV13.

For children aged 6 through 18 years who have cerebrospinal fluid leak; cochlear implant; sickle cell disease and other hemoglobinopathies; anatomic or functional asplenia; congenital or acquired immunodeficiencies; HIV infection; chronic renal failure; nephrotic syndrome; diseases associated with treatment with immunosuppressive drugs or radiation therapy, including malignant neoplasms, leukemias, lymphomas, and Hodgkin disease; generalized malignancy; solid organ transplantation; or multiple myeloma:

1. If neither PCV13 nor PPSV23 has been received previously, administer 1 dose of PCV13 now and 1 dose of PPSV23 at least 8 weeks later.
2. If PCV13 has been received previously but PPSV23 has not, administer 1 dose of PPSV23 at least 8 weeks after the most recent dose of PCV13.
3. If PPSV23 has been received but PCV13 has not, administer 1 dose of PCV13 at least 8 weeks after the most recent dose of PPSV23.

For children aged 6 through 18 years with chronic heart disease (particularly cyanotic congenital heart disease and cardiac failure), chronic lung disease (including asthma if treated with high-dose oral corticosteroid therapy), diabetes mellitus, alcoholism, or chronic liver disease, who have not received PPSV23, administer 1 dose of PPSV23. If PCV13 has been received previously, then PPSV23 should be administered at least 8 weeks after any prior PCV13 dose.

A single revaccination with PPSV23 should be administered 5 years after the first dose to children with sickle cell disease or other hemoglobinopathies; anatomic or functional asplenia; congenital or acquired immunodeficiencies; HIV infection; chronic renal failure; nephrotic syndrome; diseases associated with treatment with immunosuppressive drugs or radiation therapy, including malignant neoplasms, leukemias, lymphomas, and Hodgkin disease; generalized malignancy; solid organ transplantation; or multiple myeloma.

6\. Inactivated poliovirus vaccine (IPV). (Minimum age: 6 weeks)  | Administer a 4-dose series of IPV at ages 2, 4, 6 through 18 months, and 4 through 6 years. The final dose in the series should be administered on or after the fourth birthday and at least 6 months after the previous dose.  |

* In the first 6 months of life, minimum age and minimum intervals are only recommended if the person is at risk of imminent exposure to circulating poliovirus (i.e., travel to a polio-endemic region or during an outbreak).
* If 4 or more doses are administered before age 4 years, an additional dose should be administered at age 4 through 6 years and at least 6 months after the previous dose.
* A fourth dose is not necessary if the third dose was administered at age 4 years or older and at least 6 months after the previous dose.
* If both oral polio vaccine (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. If only OPV was administered, and all doses were given prior to age 4 years, 1 dose of IPV should be given at 4 years or older, at least 4 weeks after the last OPV dose.
* IPV is not routinely recommended for U.S. residents aged 18 years or older.

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7\. Influenza vaccines.

(Minimum age: 6 months for inactivated influenza vaccine [IIV], 18 years for recombinant influenza vaccine [RIV])

| Administer influenza vaccine annually to all children beginning at age 6 months.  |  | \

8\. Measles, mumps, and rubella (MMR) vaccine. (Minimum age: 12 months for routine vaccination)  |

* Administer a 2-dose series of MMR vaccine at ages 12 through 15 months and 4 through 6 years. The second dose may be administered before age 4 years, provided at least 4 weeks have elapsed since the first dose.
* Administer 1 dose of MMR vaccine to infants aged 6 through 11 months before departure from the United States for international travel. These children should be revaccinated with 2 doses of MMR vaccine, the first at age 12 through 15 months (12 months if the child remains in an area where disease risk is high), and the second dose at least 4 weeks later.
* Administer 2 doses of MMR vaccine to children aged 12 months and older before departure from the United States for international travel. The first dose should be administered on or after age 12 months and the second dose at least 4 weeks later.

| Ensure that all school-aged children and adolescents have had 2 doses of MMR vaccine; the minimum interval between the 2 doses is 4 weeks.  | \

9\. Varicella (VAR) vaccine.

(Minimum age: 12 months)

| Administer a 2-dose series of VAR vaccine at ages 12 through 15 months and 4 through 6 years. The second dose may be administered before age 4 years, provided at least 3 months have elapsed since the first dose. If the second dose was administered at least 4 weeks after the first dose, it can be accepted as valid.  | For children aged 7 through 12 years, the recommended minimum interval between doses is 3 months (if the second dose was administered at least 4 weeks after the first dose, it can be accepted as valid); for persons aged 13 years and older, the minimum interval between doses is 4 weeks.  | \

10\. Hepatitis A (Hep A) vaccine.

(Minimum age: 12 months)

* Initiate the 2-dose HepA vaccine series at ages 12 through 23 months; separate the 2 doses by 6 to 18 months.
* Children who have received 1 dose of Hep A vaccine before age 24 months should receive a second dose 6 to 18 months after the first dose.
* For any person aged 2 years and older who has not already received the HepA vaccine series, 2 doses of Hep A vaccine separated by 6 to 18 months may be administered if immunity against hepatitis A virus infection is desired.

| The minimum interval between the 2 doses is 6 months.  | Administer 2 doses of Hep A vaccine at least 6 months apart to previously unvaccinated persons who live in areas where vaccination programs target older children, or who are at increased risk for infection. This includes persons traveling to or working in countries that have high or intermediate endemicity of infection; men having sex with men; users of injection and non-injection illicit drugs; persons who work with HAV-infected primates or with HAV in a research laboratory; persons with clotting-factor disorders; persons with chronic liver disease; and persons who anticipate close, personal contact (e.g., household or regular babysitting) with an international adoptee during the first 60 days after arrival in the United States from a country with high or intermediate endemicity. The first dose should be administered as soon as the adoption is planned, ideally, 2 or more weeks before the arrival of the adoptee.
11\. Meningococcal vaccines.

(Minimum age: 6 weeks for Hib-MenCY [MenHibrix], 2 months for MenACWY-CRM [Menveo], 9 months for MenACWY-D [Menactra], 10 years for serogroup B meningococcal [MenB] vaccines: MenB- 4C [Bexsero] and MenB-FHbp [Trumenba])

* Administer a single dose of Menactra or Menveo vaccine at age 11 through 12 years, with a booster dose at age 16 years.
* For children aged 2 months through 18 years with highrisk conditions, see “Meningococcal conjugate ACWY vaccination of persons with high-risk conditions and other persons at increased risk” and “Meningococcal B vaccination of persons with high-risk conditions and other persons at increased risk of disease” .

* Administer Menactra or Menveo vaccine at age 13 through 18 years if not previously vaccinated.
* If the first dose is administered at age 13 through 15 years, a booster dose should be administered at age 16 through 18 years, with a minimum interval of at least 8 weeks between doses.
* If the first dose is administered at age 16 years or older, a booster dose is not needed

* Young adults aged 16 through 23 years (preferred age range is 16 through 18 years) who are not at increased risk for meningococcal disease may be vaccinated with a 2-dose series of either Bexsero (0, ≥1 month) or Trumenba (0, 6 months) vaccine to provide short-term protection against most strains of serogroup B meningococcal disease. The two MenB vaccines are not interchangeable; the same vaccine product must be used for all doses.
* If the second dose of Trumenba is given at an interval of <6 months, a third dose should be given at least 6 months after the first dose; the minimum interval between the second and third doses is 4 weeks

Meningococcal conjugate ACWY vaccination of persons with high-risk conditions and other persons at increased risk
Children with anatomic or functional asplenia (including sickle cell disease), children with HIV infection, or children with persistent complement component deficiency (includes persons with inherited or chronic deficiencies in C3, C5-9, properdin, factor D, factor H, or taking eculizumab [Soliris])  | Meningococcal B vaccination of persons with high-risk conditions and other persons at increased risk of disease: Children with anatomic or functional asplenia (including sickle cell disease) or children with persistent complement component deficiency (includes persons with inherited or chronic deficiencies in C3, C5-9, properdin, factor D, factor H, or taking eculizumab [Soliris])  | For children who travel to or reside in countries in which meningococcal disease is hyperendemic or epidemic, including countries in the African meningitis belt or the Hajj  | For children at risk during an outbreak attributable to a vaccine serogroup
Menveo:

* Children who initiate vaccination at 8 weeks. Administer doses at ages 2, 4, 6, and 12 months.
* Unvaccinated children who initiate vaccination at 7 through 23 months. Administer 2 primary doses, with the second dose at least 12 weeks after the first dose AND after the first birthday.
* Children 24 months and older who have not received a complete series. Administer 2 primary doses at least 8 weeks apart.

| MenHibrix:

* Children who initiate vaccination at 6 weeks. Administer doses at ages 2, 4, 6, and 12 through 15 months.
* If the first dose of MenHibrix is given at or after age 12 months, a total of 2 doses should be given at least 8 weeks apart to ensure protection against serogroups C and Y meningococcal disease.

| Menactra:

* Children with anatomic or functional asplenia or HIV infection
* Children 24 months and older who have not received a complete series. Administer 2 primary doses at least 8 weeks apart. If Menactra is administered to a child with asplenia (including sickle cell disease) or HIV infection, do not administer Menactra until age 2 years and at least 4 weeks after the completion of all PCV13 doses.
* Children with persistent complement component deficiency
* Children 9 through 23 months. Administer 2 primary doses at least 12 weeks apart.
* Children 24 months and older who have not received a complete series. Administer 2 primary doses at least 8 weeks apart.
* All high-risk children
* If Menactra is to be administered to a child at high risk for meningococcal disease, it is recommended that Menactra be given either before or at the same time as DTaP

| Bexsero or Trumenba:

* Persons 10 years or older who have not received a complete series. Administer a 2-dose series of Bexsero, with doses at least 1 month apart, or a 3-dose series of Trumenba, with the second dose at least 1–2 months after the first and the third dose at least 6 months after the first. The two MenB vaccines are not interchangeable; the same vaccine product must be used for all doses

| Administer an age-appropriate formulation and series of Menactra or Menveo for protection against serogroups A and W meningococcal disease. Prior receipt of MenHibrix is not sufficient for children traveling to the meningitis belt or the Hajj because it does not contain serogroups A or W.  |

* For serogroup A, C, W, or Y: Administer or complete an age- and formulation-appropriate series of MenHibrix, Menactra, or Menveo.

* For serogroup B: Administer a 2-dose series of Bexsero, with doses at least 1 month apart, or a 3-dose series of Trumenba, with the second dose at least 1-2 months after the first and the third dose at least 6 months after the first. The two MenB vaccines are not interchangeable; the same vaccine product must be used for all doses

Vaccine  | Routine vaccination  | Catch-up vaccination  | Vaccination for high risk person
12\. Tetanus and diphtheria toxoids and acellular pertussis (Tdap) vaccine. (Minimum age: 10 years for both Boostrix and Adacel)  |

* Administer 1 dose of Tdap vaccine to all adolescents aged 11 through 12 years.
* Tdap may be administered regardless of the interval since the last tetanus and diphtheria toxoid-containing vaccine.
* Administer 1 dose of Tdap vaccine to pregnant adolescents during each pregnancy (preferably during the early part of gestational weeks 27 through 36), regardless of time since prior Td or Tdap vaccination.

* Persons aged 7 years and older who are not fully immunized with DTaP vaccine should receive Tdap vaccine as 1 dose (preferably the first) in the catch-up series; if additional doses are needed, use Td vaccine. For children 7 through 10 years who receive a dose of Tdap as part of the catch-up series, an adolescent Tdap vaccine dose at age 11 through 12 years may be administered.
* Persons aged 11 through 18 years who have not received Tdap vaccine should receive a dose, followed by tetanus and diphtheria toxoids (Td) booster doses every 10 years thereafter.
* Inadvertent doses of DTaP vaccine:
* If administered inadvertently to a child aged 7 through 10 years, the dose may count as part of the catch-up series. This dose may count as the adolescent Tdap dose, or the child may receive a Tdap booster dose at age 11 through 12 years.
* If administered inadvertently to an adolescent aged 11 through 18 years, the dose should be counted as the adolescent Tdap booster

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13\. Human papillomavirus (HPV) vaccines. (Minimum age: 9 years for 4vHPV [Gardasil] and 9vHPV [Gardasil 9])  | Routine and catch-up vaccination:

* Administer a 2-dose series of HPV vaccine on a schedule of 0, 6-12 months to all adolescents aged 11 or 12 years. The vaccination series can start at age 9 years.
* Administer HPV vaccine to all adolescents through age 18 years who were not previously adequately vaccinated. The number of recommended doses is based on age at administration of the first dose.
* For persons initiating vaccination before age 15, the recommended immunization schedule is 2 doses of HPV vaccine at 0, 6-12 months.
* For persons initiating vaccination at age 15 years or older, the recommended immunization schedule is 3 doses of HPV vaccine at 0, 1–2, 6 months.
* A vaccine dose administered at a shorter interval should be re-administered at the recommended interval.
* In a 2-dose schedule of HPV vaccine, the minimum interval is 5 months between the first and second dose. If the second dose is administered at a shorter interval, a third dose should be administered a minimum of 12 weeks after the second dose and a minimum of 5 months after the first dose.
* In a 3-dose schedule of HPV vaccine, the minimum intervals are 4 weeks between the first and second dose, 12 weeks between the second and third dose, and 5 months between the first and third dose. If a vaccine dose is administered at a shorter interval, it should be re-administered after another minimum.

| Special populations:

* For children with history of sexual abuse or assault, administer HPV vaccine beginning at age 9 years.

* Immunocompromised persons, including those with human immunodeficiency virus (HIV) infection, should receive a 3-dose series at 0, 1–2, and 6 months, regardless of age at vaccine initiation.

* Note: HPV vaccination is not recommended during pregnancy, although there is no evidence that the vaccine poses harm. If a woman is found to be pregnant after initiating the vaccination series, no intervention is needed; the remaining vaccine doses should be delayed until after the pregnancy. Pregnancy testing is not needed before HPV vaccination.

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