Feline leukemia (FeLV) is a virus that weakens your cat's immune system. Unfortunately, when the immune system does not function properly, your cat may be more likely to develop other diseases, such as cancer and blood disorders. How Cats Contract Feline Leukemia Cats get feline leukemia from other cats.

Zoonosis refers to diseases that can be transmitted to humans from animals. In particular, they occur when an infected animal passes on bacteria, parasites, fungi or viruses to humans through scratches, saliva, feces and urine. Vectors (e.g., organisms like fleas and ticks) can also carry zoonotic diseases