Glossary

FVRCP vaccine

The combination cat vaccine that protects against feline herpesvirus, calicivirus and panleukopenia.

Also called: FVRCP, feline distemper combo, 3-in-1 cat vaccine, FVRCP booster

FVRCP is a single injection that covers three diseases. The letters stand for feline viral rhinotracheitis, which is feline herpesvirus, calicivirus, and panleukopenia, which is feline distemper. Some versions add a fourth part against Chlamydia, written FVRCCP, and your vet can explain whether it suits your cat.

Kittens usually receive a series of shots starting at around six to eight weeks of age, repeated every few weeks until they are about sixteen weeks old, because antibodies from the mother can block the early ones. A booster follows at about a year, and adult cats then receive boosters at intervals your vet sets, often every three years. A kitten that arrives with no records may need the series restarted.

The vaccine is one of the core vaccines, recommended for every cat including indoor-only cats, since the viruses are hardy and can be brought home on shoes and clothes. Mild tiredness or a sore spot afterward is common. Facial swelling, repeated vomiting or breathing difficulty after a shot needs a vet right away. Ask your vet which schedule fits your cat's age and lifestyle.

Last reviewed November 7, 2026

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Related terms

Core vaccines The vaccines vets recommend for every cat, as opposed to non-core vaccines chosen according to a cat's lifestyle and risk. Feline panleukopenia A highly contagious and often deadly parvovirus that attacks fast-dividing cells, mainly in unvaccinated kittens. Feline herpesvirus A common virus that causes sneezing, eye inflammation and nasal discharge, and stays in the body for life, flaring up in times of stress. Feline calicivirus A common virus behind cat flu that causes sneezing, eye discharge and painful mouth ulcers, and sometimes severe illness. Rabies vaccine The injection that protects a cat from rabies, required by law for cats in many places and recommended for all. Vaccine titer A blood test that measures antibodies to a germ, sometimes used to judge whether a cat is protected after vaccination.

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Cat vaccines explained Which vaccines cats and kittens usually get, when they are given, how lifestyle changes the plan, and what side effects to watch for.