Rabies Post‑Exposure Prophylaxis in Children

Vaccine Dose and Schedule

• Children receive the same 1.0 mL intramuscular dose of rabies vaccine as adults, administered on days 0, 3, 7, and 14 for previously unvaccinated individuals 1.
• The schedule may be given as soon as possible after exposure; the first dose is given on day 0 1.
• Minor delays of a few days for any individual dose do not affect overall efficacy 2.
• If a dose is missed, the series should be resumed with the same intervals between subsequent doses without restarting the entire series 2.

Injection Site

• For infants and small children, the anterolateral thigh is the recommended site; for older children, the deltoid muscle is preferred [3][2].
• The gluteal region must never be used because it yields lower neutralizing antibody titers 2.

Human Rabies Immune Globulin (HRIG)

• HRIG is administered at 20 IU/kg (≈0.133 mL/kg) for all ages, including children [2][3].
• The first HRIG dose is given on day 0 together with the first vaccine dose 1.
• HRIG may be given up to day 7 if not administered initially 3.
• The full HRIG volume should be infiltrated around and into any wounds when anatomically feasible; any remaining volume is injected intramuscularly at a site distant from the vaccine injection [2][3].
• HRIG must never be administered in the same syringe or anatomical site as the vaccine 2.
• Exceeding the recommended HRIG dose can partially suppress the active antibody response 2.

Special Populations

Immunocompromised Children

• Immunocompromised children require a five‑dose vaccine series on days 0, 3, 7, 14, and 28 1.

Previously Vaccinated Children

• Children with documented complete prior vaccination need only two vaccine doses (days 0 and 3) and no HRIG 1.

Rationale for Uniform Dose

• The ACIP explicitly recommends that children receive the same 1.0 mL vaccine volume as adults, differing from many other pediatric vaccines to avoid dosing errors 1.

Schedule Flexibility and Serologic Assessment

• For substantial schedule deviations, serologic testing 7–14 days after the final dose is advised to confirm adequate immune response 2.

Wound Care

• Immediate and thorough wound cleansing with water and soap is required for all exposures 1.
• If available, irrigation with a virucidal agent such as povidone‑iodine may be used 1.

Common Errors to Avoid

• Do not reduce the vaccine volume in children regardless of weight or age 1.
• Do not use the gluteal region for vaccine injection, as it diminishes immunogenicity 2.
• Do not exceed the HRIG dose of 20 IU/kg to prevent antibody suppression 2.
• Do not administer HRIG after day 7, as the vaccine‑induced antibody response is presumed to have occurred 2.
• Do not omit any vaccine dose in immunocompromised children; they must complete the five‑dose schedule 1.

Rabies Post‑Exposure Prophylaxis: Concurrent Use of Human Rabies Immune Globulin and Vaccine

Timing and Concurrent Administration

• HRIG must be administered together with the first dose of rabies vaccine on day 0 for persons without prior rabies vaccination who have been exposed to the virus. 4, 5
• If HRIG is missed on day 0, it may still be given up to and including day 7 of the vaccine series without compromising efficacy. 6, 7

Administration Requirements

Injection Technique

• HRIG and vaccine must never be mixed in the same syringe. 4, 5
• For the initial dose, HRIG and vaccine must be injected at different anatomical sites; they may share the same site for subsequent vaccine doses (days 3, 7, 14). 6, 7

Injection Sites

• Vaccine should be given in the deltoid muscle for adults and older children, and in the anterolateral thigh for infants and young children. 4, 5
• The gluteal region must be avoided for vaccine injection because it yields a reduced immunologic response. 4, 5

Dosing and Injection Technique

• The recommended HRIG dose is 20 IU per kilogram of body weight for all age groups. 4, 5
• The entire HRIG dose should be infiltrated around and into all accessible wounds whenever anatomically feasible. 4, 5, 6
• Any HRIG volume not used for wound infiltration must be administered intramuscularly at a site distant from the vaccine injection site. 4, 6, 7

Safety Considerations

• HRIG doses exceeding 20 IU/kg can partially suppress the active antibody response and should be avoided. 4, 5
• Reducing the HRIG dose below the recommended 20 IU/kg may compromise passive immunity and should not be done. 4
• Adequate separation between HRIG and vaccine injection sites for the first dose is essential to prevent interference. 6, 7

Special Populations

Previously Vaccinated Individuals

• Persons with documented complete prior rabies vaccination and adequate antibody titers should not receive HRIG; they receive vaccine only (two doses on days 0 and 3). 4, 5

Immunocompromised Patients

• Immunocompromised patients receive the standard HRIG dose (20 IU/kg) together with the first vaccine dose on day 0. 4, 5
• They require an extended five‑dose vaccine schedule (days 0, 3, 7, 14, 28) rather than the usual four‑dose regimen. 4, 5

Rabies Post‑Exposure Prophylaxis (PEP) Guidelines for Dog Bites

Immediate Wound Management

• Thoroughly wash all bite wounds with soap and water for approximately 15 minutes immediately after the incident. 8, 9
• If available, irrigate wounds with a virucidal agent such as povidone‑iodine solution. 8, 9

Human Rabies Immune Globulin (HRIG)

Dosing and Administration

• Administer HRIG at 20 IU/kg body weight on day 0, the same day the first vaccine dose is given. 8, 9
• Infiltrate the entire calculated HRIG dose directly into and around all bite wounds whenever anatomically feasible. 8, 9
• Any remaining HRIG volume after wound infiltration must be injected intramuscularly at a site distant from the vaccine injection. 8, 9

Critical Precautions

• Never administer HRIG in the same syringe or at the same anatomical site as the rabies vaccine. 8, 9
• Do not exceed the 20 IU/kg dose; excess HRIG can partially suppress the active antibody response. 8, 9
• Do not give HRIG to individuals with documented complete prior rabies vaccination, as it may inhibit the anamnestic response. 8, 9

Rabies Vaccine Schedule

Previously Unvaccinated, Immunocompetent Persons

• Give 1 mL of inactivated rabies vaccine (HDCV or PCECV) intramuscularly on days 0, 3, 7, and 14. 8, 9
• The same 1 mL dose applies to all ages, including children and infants; the volume must never be reduced. 8, 9
• Day 0 is defined as the day the first vaccine dose is administered. 8, 9

Injection Site Recommendations

• Adults and older children: deltoid muscle (mandatory). 8, 9
• Infants and young children: anterolateral thigh. 8, 9
• Never use the gluteal region, as it yields significantly lower neutralizing antibody titers and markedly reduces immunogenicity. 8, 9

Immunocompromised Persons

• Use a 5‑dose vaccine schedule on days 0, 3, 7, 14, and 28 (instead of the standard 4‑dose regimen). 8, 9

Previously Vaccinated Persons (Documented Complete Prior Vaccination)

• Administer only 2 vaccine doses on days 0 and 3 and do not give HRIG. 8, 9
• This protocol applies to anyone with documented complete prior rabies vaccination (pre‑exposure or post‑exposure) using a cell‑culture vaccine and a confirmed antibody response. 8, 9

Evidence Strength and Policy Recommendations

• The 4‑dose schedule (days 0, 3, 7, 14) for previously unvaccinated persons was adopted by the Advisory Committee on Immunization Practices (ACIP) in 2010 after evidence demonstrated it is as safe and effective as the former 5‑dose regimen, with no adverse events linked to omission of the fifth dose. Strong ACIP recommendation. 8, 9
• The schedule change saves approximately $16.6 million annually in U.S. healthcare costs while maintaining ≥99 % efficacy when combined with proper wound care and HRIG administration. 8

Guideline Recommendations for Equine Rabies Immune Globulin (ERIG) in Post‑Exposure Prophylaxis

Dosing and Administration

• Weight‑based dose: Administer ERIG at 20 IU per kilogram of body weight for patients of any age; the dose must never be exceeded because higher amounts can partially suppress the active antibody response to the rabies vaccine. (CDC/ACIP recommendation) 10
• Wound infiltration: The entire calculated ERIG dose should be infiltrated directly into and around all bite wounds whenever anatomically feasible to maximize passive antibody delivery at the exposure site. (CDC/ACIP recommendation) 10
• Residual volume: Any remaining ERIG volume after complete wound infiltration must be injected intramuscularly at a site distant from the rabies‑vaccine injection. (CDC/ACIP recommendation) 10
• Separate syringes: ERIG and rabies vaccine must never be mixed in the same syringe or administered at the same anatomical site for the initial dose. (CDC/ACIP recommendation) 10
• Guideline stance on residual volume: Both WHO and ACIP guidelines continue to recommend intramuscular administration of any leftover ERIG after wound infiltration. (CDC/ACIP recommendation) 10

Vaccine Co‑Administration

• Virucidal wound irrigation: When available, irrigate bite wounds with a virucidal agent such as povidone‑iodine after soap‑and‑water cleansing. (CDC/ACIP recommendation) 10

Post‑Exposure Prophylaxis Regimens

Previously Unvaccinated, Immunocompetent Patients

• ERIG: 20 IU/kg on day 0, infiltrated as described above. (CDC/ACIP recommendation) 10
• Rabies vaccine: 1.0 mL intramuscularly on days 0, 3, 7, and 14 (four‑dose schedule). (CDC/ACIP recommendation) 10

Immunocompromised Patients

• Vaccination schedule: Five doses of rabies vaccine on days 0, 3, 7, 14, and 28, together with the standard 20 IU/kg ERIG dose on day 0. (CDC/ACIP recommendation) 10

Previously Vaccinated Patients

• Reduced regimen: Two vaccine doses on days 0 and 3 without any ERIG, because ERIG may inhibit the anamnestic antibody response. (CDC/ACIP recommendation) 10

Injection Site Recommendations for Rabies Vaccine

• Adults and older children: Deltoid muscle (mandatory site). (CDC/ACIP recommendation) 10
• Infants and young children: Anterolateral thigh. (CDC/ACIP recommendation) 10
• Avoid gluteal region: The gluteal site yields significantly lower neutralizing antibody titers and has been linked to prophylaxis failures; therefore it must not be used. (CDC/ACIP recommendation) 10

Rabies Post‑Exposure Prophylaxis (PEP) Recommendations

Standard Schedule for Previously Unvaccinated, Immunocompetent Persons

• The Advisory Committee on Immunization Practices (ACIP) recommends a four‑dose intramuscular regimen of 1 mL rabies vaccine (HDCV or PCECV) on days 0, 3, 7, and 14 after exposure. This schedule provides ≥99 % efficacy and is supported by strong evidence. [11][12]
• Day 0 is defined as the day the first dose is administered as soon as possible after the exposure event. 12

Human Rabies Immune Globulin (HRIG) Administration

• HRIG should be given at 20 IU/kg on day 0, simultaneously with the first vaccine dose, to provide passive immunity while active immunity develops. 12
• If HRIG is missed on day 0, it may still be administered up to day 7 of the vaccine series; administration after day 7 is not recommended because the vaccine‑induced antibody response is presumed to have occurred. 12
• The HRIG dose must not exceed 20 IU/kg, as higher amounts can partially suppress the active antibody response. 12
• HRIG and vaccine must not be mixed in the same syringe nor injected at the same anatomical site for the initial dose. 12

Special Populations

Immunocompromised Patients

• For individuals with compromised immune systems, ACIP advises a five‑dose schedule (days 0, 3, 7, 14, and 28) to ensure adequate seroconversion. [11][12]

Previously Vaccinated Persons

• Persons with documented complete prior rabies vaccination (pre‑exposure or post‑exposure) using a cell‑culture vaccine and confirmed antibody response may follow a two‑dose schedule on days 0 and 3. 12
• HRIG is not given to previously vaccinated individuals because it can suppress the anamnestic antibody response. 12

Injection Technique and Precautions

• Injection site: Use the deltoid muscle for adults and older children; use the anterolateral thigh for infants and young children. 12
• Never inject rabies vaccine into the gluteal region, as this results in significantly lower antibody titers and has been linked to prophylaxis failures. 12
• Vaccine volume: Administer the full 1 mL dose to all patients, regardless of age or weight; dose reduction is not permitted.

Evidence Base and Recommendations

• In 2010, ACIP reduced the standard regimen from five to four doses after reviewing data that demonstrated equivalent safety and efficacy when combined with HRIG and appropriate wound care. This change is classified as a strong recommendation based on high‑quality evidence. [11][12]

Rabies Post‑Exposure Prophylaxis – CDC Evidence‑Based Recommendations

Vaccine Administration Sites

• Adults and older children should receive the rabies vaccine intramuscularly in the deltoid muscle. 13
• Infants and young children should receive the vaccine intramuscularly in the anterolateral thigh. 13
• The gluteal region must be avoided for vaccine injection because it yields significantly lower neutralizing‑antibody titers and has been associated with prophylaxis failures. 13

Human Rabies Immune Globulin (HRIG) Dosing and Technique

• HRIG should be administered at a dose of 20 IU per kg of body weight on day 0; doses exceeding this amount may partially suppress the active antibody response to the vaccine. 13
• The entire calculated HRIG dose must be infiltrated directly into and around all bite wounds whenever anatomically feasible; inadequate wound infiltration has been linked to rare prophylaxis failures. 13
• Any remaining HRIG volume after complete wound infiltration should be injected intramuscularly at a site distant from the vaccine injection site. 13
• HRIG and vaccine must never be mixed in the same syringe or administered at the same anatomical site for the initial dose. 13

Timing and Schedule Flexibility

• Day 0 is defined as the day the first vaccine dose is administered and should occur as soon as possible after exposure. 13
• Minor delays of a few days for individual vaccine doses do not compromise overall efficacy. 13
• If a scheduled dose is missed, it should be given as soon as possible and the series resumed with the same intervals between subsequent doses; the series should not be restarted. 13
• Example: If the day‑7 dose is missed and the patient presents on day 10, the missed dose is given immediately and the remaining doses are scheduled at 7‑day intervals (e.g., days 17 and 24). 13
• For substantial schedule deviations (weeks or more), immune status should be assessed by measuring rabies‑virus neutralizing antibody titers 7–14 days after the final dose. 13

Critical Pitfalls to Avoid

• Do not underdose HRIG or fail to infiltrate wounds completely, as inadequate infiltration has been linked to rare prophylaxis failures. 13
• Do not inject vaccine into the gluteal region, as this markedly reduces immunogenicity and has caused prophylaxis failures. 13

Tetanus Prophylaxis and Injection‑Site Recommendations for Rabies Post‑Exposure Prophylaxis

Adjunctive Measures

• For all individuals receiving rabies post‑exposure prophylaxis, administer tetanus prophylaxis and appropriate bacterial infection‑control measures as indicated – recommended by the MMWR 1991 report. 14

Injection‑Site Recommendations

• Avoid injecting rabies vaccine into the gluteal region; the deltoid (adults/older children) or anterolateral thigh (infants/young children) should be used because gluteal administration yields significantly lower neutralizing antibody titers and has been linked to prophylaxis failures – based on the MMWR 1991 guidance. 14