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.
Progressive infections Cats with progressive FeLV infections have FeLV virus particles in their blood streams, may serve as sources of infection for other cats, and often begin to show clinical signs of disease. Orange kitty yawning.
Feline Leukemia Virus Treatment. FeLV doesnt have a cure. Your veterinarian can only treat secondary infections and support your cats body with vitamins and medications that strengthen their immune system.

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.
Key Points. Feline leukemia virus, or FeLV, is an infectious disease that affects 2-3% of cats in the United States. Its more common in younger cats and cats that spend a lot of time outdoors.

FeLV (or Feline Leukemia Virus) attacks the immune system, weakening cats' ability to fight off illnesses. It's often fatal, but can be prevented via vaccine.
FeLV and FIV stand for feline leukemia virus and feline immunodeficiency virus. Both are contagious. There's no cure, but cats can live with the infection.