Why is feline leukemia contagious but human leukemia isn’t?
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Feline leukemia refers to “Feline Leukemia **Virus**” (FeLV for short), and because it’s a virus, it is contagious. Although FeLV *can* cause cancer in cats, it is not a cancer in and of itself. The virus got its name because it was first discovered in cats with leukemia.
Human leukemia, on the other hand, refers to the actual blood cancer (and is therefore not contagious).
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