Feline leukemia virus is a retrovirus that infects cats. FeLV can be transmitted from infected cats when the transfer of saliva or nasal secretions is involved.
Feline leukemia virus (FeLV) is one of the most common and important infectious diseases in cats, affecting between 2-3% of all cats in the United States and Canada. Infection rates are significantly higher (up to 30%) in cats that are ill or otherwise at high risk (see below).
Feline leukemia virus, also known as FeLV, is one of the more common infectious diseases affecting cats. Based on the name, you might think that FeLV is a blood cancer like leukemia in humans. But it is actually a contagious retrovirus that suppresses a cats immune system.

Feline leukemia virus is a common disease that affects about 2% of cats in the United States. It is spread cat-to-cat and leads to the destruction of the cats white blood cells and immune system. This. leaves them more susceptible to infection, cancer, and death.
Feline leukemia virus (FeLV) is one of the most common infectious causes of disease of cats globally. Infection with FeLV can cause a variety of clinical signs, impacting a cat's longevity and quality of life.

Feline leukemia in cats is an often misunderstood disease. Learn about common misconceptions about the diagnosis and adopting a cat with the FeLV.
Learn important information about cat leukemia, including how it spreads, common symptoms, testing & diagnosis info, treatments and prevention options.