Rabies Post-Exposure Prophylaxis After Prior Completed 4-Dose Series
No additional rabies vaccine beyond the standard repeat post-exposure regimen is recommended after completion of a prior rabies post-exposure prophylaxis (PEP) series. (cdc.gov)
For people with previous rabies vaccination, post-exposure management after a new exposure consists of two additional rabies vaccine doses given 3 days apart, without human rabies immune globulin (HRIG). (cdc.gov)
Rabies Vaccine Booster Requirement
After a new exposure occurring 2 months after completing a 4-dose PEP series, rabies vaccine should be administered as 2 doses only. (cdc.gov)
HRIG should not be administered for previously vaccinated people. (cdc.gov)
Medication Selection Algorithm
Rabies vaccine is selected based on the patient’s prior vaccination status.
- Previously vaccinated (including completion of prior PEP): rabies vaccine only in a 2-dose schedule. (cdc.gov)
- Not previously vaccinated: rabies vaccine plus HRIG with a multi-dose vaccine series. (cdc.gov)
Treatment Initiation Thresholds
Rabies PEP is initiated when a rabies risk assessment indicates that PEP is needed after a potential exposure. (cdc.gov)
Day 0 is defined as the day the first dose of the repeat rabies vaccine schedule is administered for that new exposure. (cdc.gov)
Monotherapy vs Combination Therapy
For previously vaccinated patients, rabies PEP is vaccine monotherapy without HRIG. (cdc.gov)
Combination therapy with HRIG is reserved for patients who have never been vaccinated against rabies. (cdc.gov)
Common Pitfalls to Avoid
HRIG should not be given to previously vaccinated patients, including during repeat PEP courses. (cdc.gov)
HRIG should never be administered in the same syringe or anatomical site as the first vaccine dose during an initial (non-prior-vaccination) PEP course. (cdc.gov)
Target Goals of Therapy
The goal of the repeat 2-dose rabies vaccine schedule in previously vaccinated patients is to provide additional post-exposure immune boosting after a new potential exposure. (cdc.gov)