Final answer:
Feline leukemia is caused by a virus that weakens the immune system of cats and can lead to various health problems. It is not a cancer, but it can increase the risk of certain types of cancer in affected cats.
Step-by-step explanation:
The disease feline leukemia is related to the actual condition because it is caused by a virus called feline leukemia virus (FeLV). Contrary to what was initially believed, it is not a cancer, but a viral infection that affects the blood cells and weakens the immune system of cats. The virus can lead to various health problems and makes cats more susceptible to developing certain types of cancer.
Learn more about Feline leukemia and its relation to the actual condition