Cat flu symptoms, treatment and prevention

Cat flu, also known as feline influenza or feline upper respiratory infection, is a common illness that affects the upper respiratory tract (nose, mouth, and throat) of cats. Learn more

A photo of a cat being examined by a vet for symptoms of cat flu, emphasising the importance of early diagnosis and treatment to keep cats healthy.

Overview

What is cat flu?

Cat flu, also known as feline influenza or feline upper respiratory infection, is a common illness that affects the upper respiratory tract (nose, mouth, and throat) of cats. It’s mostly caused by two common viruses, and leads to symptoms similar to human flu. It's treatable in most cases, and there is a cat flu vaccine, but chronic infection with regular acute flare-ups is common.

In some cases, it can be severe, and even fatal. Kittens are especially susceptible to severe flu, due to their immature immune systems. Elderly and immunosuppressed cats are also vulnerable, alongside the unvaccinated cat population.

What are cat flu symptoms?

What causes cat flu?

Cat flu treatment

Adopting a cat with feline influenza

Can cats get colds?

Medically reviewed by Lizzie Youens BSc(Hons) BVSc MRCVS

Published on 29/11/2022 • Reviewed on 21/10/2024