Feline Leukemia Virus FeLV is a common scourge transmitted easily from one cat to another through saliva shared food bowls and litter boxes Infected mother cats can also pass the disease on to their kittens Like leukemia in humans the disease is a cancer of the blood cells and is very deadly FeLV affects approximately 5 percent of pet cats but even cats immune to the disease can be carriersVaccinating your cats with FelOVax LvKor kittens 8 weeks and older with a followup vaccine one month later effectively immunizes them against the disease Afterward an annual booster vaccine is recommended to keep your cats free from FeLV throughout their livesFelOVax LvK is recommended for veterinary use licensed breeders and trained individuals may alsoOther products from PetCareRx