Vaccines protect cats against several serious and sometimes fatal diseases, including panleukopenia, cat flu viruses and rabies. Kittens need a series of shots in their first few months, then boosters to keep protection going. The exact plan depends on your cat’s age, lifestyle and where you live, so your vet will tailor it, but knowing the basics helps you keep track and ask the right questions.
Quick answer: Core vaccines for cats are FVRCP (which covers feline herpesvirus, calicivirus and panleukopenia) and rabies, with feline leukemia virus (FeLV) recommended for kittens. Kittens usually start at 6–8 weeks, have boosters every 3–4 weeks until about 16 weeks, then a booster around a year later. Adult cats then need boosters every 1–3 years depending on the vaccine, their risk and local law.
Core and non-core vaccines
Vets divide vaccines into two groups. Core vaccines are recommended for almost all cats because the diseases are common, serious or a public health risk. Non-core vaccines are given based on a cat’s individual risk.
| Vaccine | Protects against | Who needs it |
|---|---|---|
| FVRCP | Feline herpesvirus-1 and calicivirus (major causes of cat flu) and feline panleukopenia (feline parvovirus) | Core: all cats |
| Rabies | Rabies, a fatal disease that can spread to people | Core in most places; often required by law |
| FeLV | Feline leukemia virus | Core for kittens under 1 year; for adults, based on risk such as going outdoors or living with infected cats |
| Chlamydia, Bordetella | Bacterial causes of eye and respiratory infections | Non-core: mainly multi-cat homes, shelters or catteries |
The 2020 AAHA/AAFP feline vaccination guidelines list herpesvirus, calicivirus, panleukopenia and rabies as core vaccines for pet cats, plus FeLV for cats under a year old. They also recommend that a cat’s vaccine risk is reviewed at least once a year.
Kitten vaccination schedule
Kittens get some protection from their mother’s milk, but it fades over their first weeks and can block vaccines from working fully. That’s why kittens need a series of doses rather than a single shot. A typical schedule, based on PetMD’s vet-reviewed guide, looks like this:
| Age | Vaccines usually given |
|---|---|
| 6–8 weeks | First FVRCP; first FeLV may start now or at the next visit |
| 10–12 weeks | FVRCP booster; FeLV first or second dose |
| 14–16 weeks | FVRCP booster; rabies; FeLV second dose if needed |
| About 1 year after the kitten series | FVRCP and rabies boosters; FeLV booster if needed |
Boosters are usually spaced 3–4 weeks apart, with the last kitten FVRCP dose given at around 16 weeks or older. Your vet may adjust timings for kittens that start late, have an unknown history, or come from a shelter. First visits are also a good time to start deworming and flea control; see worms in cats and common health problems in kittens.
Until a kitten has finished its first series, keep it away from unknown cats and places where unvaccinated cats may have been.
Vaccines for adult cats
- FVRCP: after the one-year booster, often every three years for lower-risk indoor cats, and sometimes more often for cats that go outdoors, board or live with many other cats.
- Rabies: every one or three years, depending on the vaccine used and local law. Many places legally require rabies vaccination.
- FeLV: for adult cats at risk, such as cats that go outdoors or live with FeLV-positive cats. Your vet may suggest testing before vaccinating.
Adopting an adult cat with no records? Vets usually treat it as unvaccinated and give a starting series, then move to a regular schedule.
Do indoor cats need vaccines?
Yes. Panleukopenia virus is very hardy and can be carried into the home on shoes, clothing and hands, and cat flu viruses can spread from new cats or during vet visits and boarding. Rabies can be required by law even for indoor cats, and bats or other animals can occasionally get indoors. Indoor cats may need fewer non-core vaccines, but core vaccines are still recommended.
Side effects and safety
Most cats have no problems after vaccination, or just mild, short-lived effects such as soreness at the injection site, tiredness or a reduced appetite for a day. Serious reactions are rare. PetMD reports reactions in roughly 0.5% of vaccinated cats.
Urgent: contact your vet straight away if your cat has facial swelling, hives, vomiting, diarrhea, breathing trouble or collapses after a vaccine. Also tell your vet about any lump at an injection site that doesn’t go away within a few weeks or keeps growing, as these need checking.
Vets use risk-based schedules partly to avoid giving more vaccines than a cat needs. A calm carrier routine makes these visits less stressful.
Vaccines and new pets
Before bringing a new cat home, make sure your existing cats are up to date, and ask your vet whether the newcomer should be tested for FeLV and FIV. Keep a new cat separate until it has had a health check; see how to introduce a new cat to your cat. If you’re adding a cat to a home with a dog, our guide on introducing a cat and a dog may help.
Vaccines help protect against some causes of cat flu, though vaccinated cats can still catch milder forms. See upper respiratory infection in cats.
Frequently asked questions
When should my kitten get its first shots?
Most kittens have their first FVRCP vaccine at around 6–8 weeks old, followed by boosters every 3–4 weeks until about 16 weeks. Rabies is usually given at around 12–16 weeks, depending on the vaccine and local rules.
Does my indoor cat really need vaccines?
Yes. Core vaccines are recommended for indoor cats too, because some viruses can be carried in on shoes and clothing, and rabies vaccination may be required by law. Your vet may recommend fewer non-core vaccines for an indoor-only cat.
How often do adult cats need boosters?
After the first-year booster, FVRCP is often given every three years for lower-risk cats, and rabies every one or three years depending on the vaccine and local law. Higher-risk cats may need some vaccines more often.
Is it normal for my cat to be tired after vaccines?
Yes, mild tiredness, a small sore spot or a slightly reduced appetite for a day or so is common. Contact your vet if your cat has swelling of the face, vomiting, breathing problems or seems very unwell.
