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. If the animal's immune system fails to neutralize the virus, it may become severely weakened by it, potentially leading to lethal disease.
Neurological Disorders. Feline Vision Problems: A Host of Possible Causes. 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.
Diagnosing Feline Leukemia Virus. Your veterinarian can diagnose the disease by conducting a simple blood test called an ELISA, which identifies FeLV proteins in the blood. This test is highly sensitive and can identify cats with very early infections.

Feline leukemia virus (FeLV) affects cats immune system. Read FAQs about the disease, including transmission, signs, diagnosis, and prognosis.
Feline leukemia (or FeLV) is the leading viral killer of cats. It weakens the immune system, increases susceptibility to other diseases, causes blood disorders and is the most common cause of cancer in cats.

Furthermore, visual representations like the one above help us fully grasp the concept of Feline Leukemia Disease Duration And Prognosis.
alt Feline leukemia virus (FeLV) is one of the most common infectious diseases in cats, affecting between 2 and 3% of all cats in the United States. Infection rates are significantly higher (up to 30%) in cats that are ill or otherwise at high risk (see below).
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.