Marvel has Feline Leukemia Virus (FeLV). This means his immune system is a little weak. Because of this he may need a little extra vet care, but that doesn't mean he can't live a long and happy life in an indoor only home. FeLV only affects other cats (not dogs or humans!) and is spread via many bodily fluids including saliva, nasal secretions, urine, feces, and blood. Consider adopting an FeLV cat today!