The effectiveness of feline leukemia vaccines varies, but none give 100 - percent protection against the virus. (scenichillsvet.com)
For outdoor cats, our vet recommends two feline leukemia vaccines separated by at least 14 days, administered between eight and 16 weeks. (catster.com)
The killed feline leukemia vaccine and the killed rabies vaccine have been implicated as being more likely to be involved. (vin.com)