Everything you need to know after an animal bite — exposure categories, first aid, the 4-dose ARV schedule, RIG dosing, and why timely action saves lives.
A dog bite. A scratch from a stray cat. A monkey grazing your hand. These moments happen every day across India — and in the panic that follows, most people don't know what to do next, or how serious the risk really is.
Rabies is one of the most feared diseases in medicine, and for good reason: once symptoms appear, it is almost always fatal. There are fewer than a handful of documented human survivors in recorded medical history. India accounts for approximately 36% of the world's rabies deaths — around 18,000–20,000 people per year. Almost all of these deaths are preventable.
Rabies is 100% preventable if you act quickly and correctly after an exposure. This guide tells you exactly what to do.
Rabies is a viral disease caused by the Rabies lyssavirus, which attacks the central nervous system. Once the virus reaches the brain, it causes progressive and fatal encephalitis — inflammation of the brain. In India, dogs are responsible for over 96% of rabies deaths in humans. Other animals that can transmit rabies include cats, monkeys, jackals, foxes, and bats.
Rabies CAN spread through: bite wounds from an infected animal, scratches that break the skin, licks on open wounds or mucous membranes (eyes, mouth, nose), and rarely through organ transplants from infected donors.
Rabies CANNOT spread through: intact unbroken skin, touching or petting an animal, blood or urine of an infected animal, or contact with a vaccinated pet showing no symptoms.
Not every animal bite comes from a rabid animal — but you cannot know for certain at the time of exposure. Warning signs in animals include:
⚠️ A healthy-looking animal can still be in the early stages of rabies. Do not wait to see if the animal develops symptoms before seeking medical care. You may observe the animal in parallel — but never instead of seeking treatment immediately.
The first thing a doctor assesses after an animal exposure is the category of exposure. This determines what treatment you need.
Touching or feeding animals, licks on intact unbroken skin.
→ No PEP required
Nibbling of uncovered skin, minor scratches or abrasions without bleeding.
→ ARV vaccine only
Transdermal bites, bleeding scratches, licks on broken skin or mucous membranes, bat exposure.
→ ARV + RIG on Day 0
⚠️ When in doubt, treat as Category III. It is always safer to do more. The consequences of under-treating a rabies exposure are irreversible.
Before you reach a hospital, the single most important action you can take is wash the wound immediately. This one step significantly reduces the chance of the virus entering nerve tissue.
Post-exposure prophylaxis (PEP) is the medical treatment given after a rabies exposure to prevent the disease from developing. It has two components: the Anti-Rabies Vaccine (ARV) and, for Category III exposures, Rabies Immunoglobulin (RIG).
India follows the 4-dose intramuscular Essen regimen recommended by the NCDC and WHO. The vaccine stimulates your immune system to produce antibodies against the rabies virus.
Day 0 is the day of the first injection — not necessarily the exact day of the bite, though you should start as soon as possible. The vaccine is given as an intramuscular injection into the deltoid muscle (upper arm) in adults, or the anterolateral thigh in young children. Never in the gluteal region (buttocks), as absorption there is poor.
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RIG provides immediate, passive immunity — ready-made antibodies that neutralise the virus at the wound site while the vaccine takes several days to build the body's own immune response. This bridging period is critical in severe exposures.
RIG is given only once — on Day 0, alongside the first ARV dose. It cannot be given on a later day. As much of the dose as anatomically possible must be infiltrated directly into and around the wound. Any remaining volume is given as an intramuscular injection at a site distant from the vaccine.
| Type | Source | Dose | Notes |
|---|---|---|---|
| ERIG (Equine RIG) | Horse serum | 40 IU/kg body weight | Widely available; skin sensitivity test recommended before use |
| HRIG (Human RIG) | Human donors | 20 IU/kg body weight | Preferred where available; lower risk of adverse reaction |
⚖️ Use the RxMedCalc ARV Dose & RIG Calculator to calculate the exact RIG dose in mL by body weight for both ERIG and HRIG.
Some government hospitals use an Intradermal (ID) regimen instead of the standard IM Essen schedule. Here is a quick comparison:
| Feature | Intramuscular (IM) Essen | Intradermal (ID) |
|---|---|---|
| Visits | 4 (Days 0, 3, 7, 28) | 3 (Days 0, 3, 7) |
| Injection sites | 1 site per visit | 2 sites per visit (0.1 mL each) |
| Vaccine volume | Full vial per dose | Fraction of vial — more economical |
| Availability | Most hospitals | Certified centres only |
| Suitability | All patients | Not for immunocompromised patients |
Patients on immunosuppressive therapy, HIV-positive individuals with low CD4 counts, or those on systemic corticosteroids may have a blunted vaccine response. They may require a 5th dose on Day 90, antibody titre testing to confirm adequate immunity, and RIG even for Category II exposures in some cases. Always consult an infectious disease specialist.
If a person has previously completed a full pre-exposure or post-exposure rabies vaccine course with documented immunity, they require only 2 booster doses (Days 0 and 3) — and no RIG is needed.
Rabies PEP is not contraindicated in pregnancy. The risk of untreated rabies exposure far outweighs any theoretical risk from the vaccine. Pregnant women should receive the full PEP regimen including RIG where indicated.
The same dose and schedule applies to children as adults for the ARV. RIG dose is calculated by body weight using the same formula. In young children, the injection site is the anterolateral thigh rather than the deltoid.
The incubation period — from bite to symptoms — typically ranges from 1 to 3 months, but can be as short as a week or as long as a year. Bites on the face or neck progress faster due to proximity to the brain.
Early symptoms include fever, headache, weakness, and a distinctive pain or burning at the wound site. Later symptoms include hydrophobia (spasm triggered by water), aerophobia (fear of air drafts), hypersalivation, hallucinations, and paralysis.
⚠️ Without prior vaccination, rabies is essentially 100% fatal once symptoms begin. There is no effective treatment at this stage. This is why immediate PEP — before the virus reaches the brain — is the only window of opportunity.
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This article is written for informational purposes and is based on NCDC India and WHO guidelines current at the time of publication. It is not a substitute for professional medical advice. Always consult a qualified physician for clinical decisions regarding rabies post-exposure prophylaxis.
Built by an MBBS, AFIH Certified Physician in Punjab, India | RxMedCalc.com