Feline Leukemia is a viral disease caused by the Feline Leukemia Virus (FeLV), which affects cats' immune systems. It can lead to various health issues, including anemia, infections, and certain cancers. The virus is primarily spread through saliva, so cats can contract it through grooming or sharing food and water bowls. Cats that are infected with FeLV may not show symptoms for years, but they can still spread the virus to other cats. Regular testing and vaccination are important for prevention. If a cat is diagnosed with Feline Leukemia, it is essential to provide supportive care and monitor their health closely.