Here is what she said to me as a professional:
"Gypsy is a 1 year old female cat who was diagnosed with feline leukemia. Because of this she is hard to place in a home because it is a contagious disease. She would always need to be in a one cat household, remain indoors only. Feline leukemia is a viral disease that can predispose to illnesses later in life but they can live a very long normal life as well. She is extremely affectionate and social. I have dealt with many Felv positive cats and many live a very long healthy life."
That's the advice from my niece but it's always good to hear from people who have actually lived and dealt with cats with the disease...........
Feline Leukemia Virus;http://www.vet.cornell.edu/fhc/Health_Information/brochure_felv.cfm
The I’d say, meet the cat & see if you have a connection. If so, and you’re okay with it being an only cat for the years to come, then give her a home & love.
Leukemia or not, it isn’t only up to humans; cats or dogs choose too.
Actually, in my experience, cats, in particular, have a tremendous instinct and choose their human companion - for a cat, it’s all about a natural & instinctive connection.