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Feline Leukemia Virus, Also Know As FeLV, Is A Virus That Can Infect Cats & Cause Cancer.

Feline leukemia virus

Feline leukemia virus is a retrovirus that infects cats. FeLV can be transmitted from infected cats when the transfer of saliva or nasal secretions is involved. If not defeated by the animal's immune system, the virus weakens the cat's immune... Wikipedia
Family: Retroviridae
Genus: Gammaretrovirus
Kingdom: Pararnavirae
Species: Feline leukemia virus