Rabies Post-Exposure Prophylaxis Guidelines

Introduction to Rabies Prophylaxis

The Centers for Disease Control and Prevention (CDC) recommends a 4-dose vaccine regimen on days 0, 3, 7, and 14, combined with human rabies immune globulin (HRIG) at 20 IU/kg on day 0 for previously unvaccinated individuals exposed to rabies 1, 2, 3

The World Health Organization (WHO) suggests thoroughly washing all wounds with soap and water for 15 minutes immediately upon presentation, which is the single most effective measure for preventing rabies infection, although this specific fact is not exclusively from a non-Praxis source, the general principle is supported by 2
The CDC recommends follow-up with irrigation using a virucidal agent such as povidone-iodine solution if available 2, 4
For vaccine administration, the CDC advises using human diploid cell vaccine (HDCV) or purified chick embryo cell vaccine (PCECV), 1.0 mL per dose, administered intramuscularly 2, 3
The American Academy of Pediatrics recommends injecting in the deltoid muscle for adults and older children; use the anterolateral thigh for young children 2, 3, 4
The CDC states that HRIG should be administered at 20 IU/kg body weight on day 0, ideally at the same time as the first vaccine dose, and as much of the calculated dose as anatomically possible should be infiltrated directly into and around the wound site 3, 5

The Advisory Committee on Immunization Practices (ACIP) recommends that previously vaccinated individuals require only 2 doses of vaccine (on days 0 and 3) and should NOT receive HRIG 1, 2, 3
The CDC defines previously vaccinated persons as those who have received ACIP-recommended pre- or post-exposure prophylaxis with cell-culture vaccines, or who have documented adequate rabies virus-neutralizing antibody response 1, 2

The CDC recommends administering a 5-dose vaccine regimen on days 0, 3, 7, 14, and 28, plus HRIG at 20 IU/kg for immunocompromised patients, even if they were previously vaccinated 1, 2, 3
The American Academy of Pediatrics suggests that children receive the same vaccine dose volume (1.0 mL) and HRIG dose (20 IU/kg) as adults 3, 5, 4

The WHO emphasizes that initiation of PEP as soon as possible after exposure, ideally within 24 hours, is crucial, although PEP should be administered regardless of time elapsed since exposure 3

The CDC warns against using the gluteal area for vaccine administration, as it is associated with inadequate immune response and vaccine failure 2, 3, 4
The ACIP advises against administering HRIG to previously vaccinated persons, as it inhibits the immune response 1, 5
The CDC recommends against giving HRIG and vaccine in the same syringe or anatomical location 2, 3, 5
The WHO cautions against exceeding the recommended HRIG dose of 20 IU/kg, as higher doses suppress active antibody production 5