What Is the Rabies Vaccine?
The rabies vaccine trains your immune system to recognize and neutralize the rabies virus before it can reach the brain. After a potential exposure, timing is critical — treatment should be given before symptoms begin if indicated, as there is no effective treatment once rabies symptoms appear. The schedule must be followed exactly as prescribed.
Who Needs Post-Exposure Rabies Vaccine?
Post-exposure prophylaxis (PEP) is considered for people who have had a potential rabies exposure, including:
- bites or scratches from bats, raccoons, foxes, skunks, or other wildlife known to carry rabies
- bites or scratches from dogs, cats, or other domestic animals that cannot be observed or tested
- direct contact between animal saliva and broken skin, open wounds, or mucous membranes
- waking up in a room where a bat was found and direct contact cannot be ruled out
Rabies Vaccine Schedule Explained
After a clinician or public-health authority determines that PEP is indicated, the standard US regimen for most people never previously vaccinated includes wound care, HRIG, and four vaccine doses. The vaccine doses build protection over time; HRIG supplies immediate antibodies at the start.
Day 0 — First Dose
The first vaccine dose is given when PEP begins. For a person never previously vaccinated, HRIG is also administered once at the start of the indicated PEP course. CDC recommends HRIG and vaccine for both bite and non-bite exposures when PEP is indicated; exposure severity is not the rule for omitting HRIG. Day 0 means the day the first vaccine dose is given, not necessarily the day of exposure.
Day 3 — Second Dose
The second dose strengthens the early immune response. It must be given within the correct time window from Day 0 — if your Day 0 was a Monday, Day 3 is Thursday.
Day 7 — Third Dose
The third dose continues building antibody levels and immune memory.
Day 14 — Fourth Dose
The fourth dose completes the standard post-exposure course for most unvaccinated patients. Under US guidance, people with immune disorders need a fifth dose on day 28 and antibody testing after the course; the treating professional guides follow-up.
What Is Human Rabies Immune Globulin (HRIG)?
HRIG provides ready-made antibodies while the vaccine begins building an immune response. Under current US CDC guidance, when PEP is indicated for someone never previously vaccinated, HRIG is part of the regimen for both bite and non-bite exposures. A clinician determines whether PEP is indicated; the site does not make that decision.
HRIG is given only once, at the beginning of PEP. When anatomically possible, the clinician infiltrates the dose into and around wounds and gives any remainder at a site distant from vaccine administration. People classified as previously vaccinated should not receive HRIG.
A Different Schedule for Previously Vaccinated People
How a future exposure is managed depends on the documented prior regimen and, for some PrEP recipients, whether required titer or booster follow-up was completed. People whom a clinician or public-health authority classifies as previously vaccinated receive two vaccine doses on days 0 and 3 and should not receive HRIG. See Human Rabies PEP for Previously Vaccinated People for the full explanation.
Why Timing Is Critical and What If You Fall Behind
Rabies progresses along nerves toward the brain. The goal of treatment is to neutralize the virus before it reaches the central nervous system. Once symptoms appear, there is no proven treatment. Seek prompt medical or public-health assessment after a possible exposure. If PEP is indicated, follow the schedule prescribed by the treating professional. If time has passed or a scheduled dose was missed, still contact the clinician or public-health authority for case-specific guidance.
What If You Miss a Dose or Fall Behind?
Do not stop treatment or assume that missing a dose means starting over. Contact your healthcare provider or local health department immediately. In most cases, the schedule can be adjusted and the remaining doses completed. What you must not do is abandon the course without medical guidance.
Side Effects, Where to Get PEP and What It Costs
Common Side Effects
- mild pain, redness, or swelling at the injection site
- low-grade fever or general fatigue
- headache or muscle aches
- nausea in some cases
Serious reactions are uncommon. When rabies PEP is recommended, the protective benefit of completing the prescribed regimen generally outweighs the risk of common, usually manageable vaccine side effects. Do not stop the course due to mild side effects without consulting your clinician first.
Side Effects to Expect
Most people experience only mild side effects after the rabies vaccine: injection-site soreness, mild fever, fatigue, and occasional headache. Severe allergic reactions are rare but can occur. See rabies vaccine side effects for the full safety profile.
Where to Get Rabies PEP
Rabies vaccine and RIG services and availability vary by facility and can change. Before traveling, call to confirm hours, products, and assessment services. Hospital emergency departments are more likely to have or be able to source the product quickly. For help finding a provider, see our facility contact guide for rabies PEP.
Cost of the Series
US initial PrEP uses two doses. PEP costs depend on prior vaccination, immune status, HRIG and visit fees. Request a current provider quote for the complete professionally confirmed plan. State and county public health departments can sometimes provide reduced-cost treatment. See rabies vaccine cost for humans and the universal how much does a rabies shot cost.
Related Guides on SafeRabies
- How long does the rabies vaccine last
- Missed a rabies vaccine dose
- Rabies vaccine cost for humans
- Rabies vaccine side effects
- PEP for previously vaccinated people
Sources
Primary guidance checked September 9, 2026: