If you’ve never been vaccinated against rabies and you’re bitten by a potentially rabid animal, you’ll receive a total of five injections: one dose of rabies immune globulin plus four doses of vaccine spread over two weeks. The exact number changes depending on whether you’ve been vaccinated before and whether you’re getting shots to prevent rabies or treat a possible exposure.
Shots After a Potential Exposure
Post-exposure prophylaxis, commonly called PEP, is what most people are searching about. This is the treatment you receive after an animal bite, scratch, or other contact that could transmit rabies. For someone who has never been vaccinated, PEP involves two components given on the first visit: rabies immune globulin (a separate injection that provides immediate, temporary protection) and the first dose of rabies vaccine. You then return for additional vaccine doses on days 3, 7, and 14, counting from that first visit as day 0.
That adds up to four vaccine doses plus the immune globulin injection. The immune globulin is dosed based on your body weight and injected directly into and around the wound site. Any remaining volume goes into a muscle at a different location from the vaccine. This combination works because the immune globulin neutralizes the virus right away while the vaccine trains your immune system to fight it on its own over the following weeks.
The vaccine itself is given in the upper arm muscle for adults and older children, or the thigh for younger children. It is not given in the buttock, because absorption there is less reliable and can lead to a weaker immune response.
Fewer Shots If You’ve Been Vaccinated Before
If you’ve already completed a rabies vaccine series at some point in your life, the protocol is much simpler. You need only two vaccine doses, given on days 0 and 3. You do not need the immune globulin injection at all, because your immune system already has a foundation of protection and just needs a rapid boost. This applies to people who received either a pre-exposure series or a full post-exposure series in the past.
Preventive Shots Before Any Exposure
Some people get vaccinated against rabies before any bite happens. This includes veterinarians, wildlife workers, travelers heading to areas where rabies is common, and lab workers who handle the virus. The CDC’s current pre-exposure schedule calls for two doses given one week apart, on days 0 and 7. This replaced an older three-dose schedule and provides protection for up to three years.
For people with ongoing risk, a blood test to check antibody levels (called a titer check) may be recommended one to three years after that initial two-dose series. Alternatively, a single booster dose can be given in that same window instead of the blood test. The specific follow-up depends on how frequently you’re likely to encounter the virus.
How the Schedule Differs Outside the U.S.
The schedules above follow CDC guidelines used in the United States, where all doses are given as intramuscular injections. The World Health Organization recommends a shorter, more affordable option used widely in other countries: smaller doses injected into the skin (intradermal) at two sites on days 0, 3, and 7. This approach uses 60 to 80 percent less vaccine per course, requiring only one to two vials instead of the four to five needed for the intramuscular method. Both routes are considered equally safe and effective.
If you’re traveling and receive rabies treatment abroad, the schedule and injection method may look different from what you’d experience in the U.S., but the WHO regimen is well supported by evidence. Previously vaccinated individuals under the WHO protocol need just two intradermal doses on days 0 and 3, similar to the CDC approach.
What the First Visit Looks Like
The first appointment is the most involved. For an unvaccinated person, you’ll receive the immune globulin injection at or near the wound, plus the first vaccine dose in a separate location (typically the opposite arm). If the wound is small, such as on a finger or toe, the amount of immune globulin injected at the site may be limited to prevent painful swelling. The remainder goes into a muscle elsewhere on the body.
After that first visit, the remaining three doses are quick single injections in the upper arm. Most people describe mild soreness at the injection site, similar to a flu shot. The entire series wraps up on day 14, so the full course takes two weeks from start to finish.
Why Timing Matters
Rabies is nearly always fatal once symptoms appear, but PEP is extremely effective when started promptly. There is no strict deadline, but treatment should begin as soon as possible after a potential exposure. The immune globulin is only given at the first visit because it needs to act before your body builds its own antibody response. If more than seven days have passed since the first vaccine dose, immune globulin is no longer administered, since the vaccine has already begun producing its own protection.
Washing the wound thoroughly with soap and water for at least 15 minutes immediately after a bite is one of the most effective first steps you can take. This alone significantly reduces viral load at the wound site and buys time before you reach a medical facility.