Can some cats harbor feline leukemia virus without showing any clinical signs?

Feline leukemia virus (FeLV) can indeed be present in some cats without showing any clinical signs, which is why the answer that states some can remain asymptomatic is correct. Many infected cats may carry the virus without exhibiting symptoms for an extended period, potentially spanning months or even years. This asymptomatic phase is concerning because these cats can still transmit the virus to other cats through saliva, urine, or other bodily fluids, increasing the risk of spreading FeLV within a population.

The incorrect options suggest that all cats with FeLV will show symptoms or that only specific categories of cats, such as young kittens or purebred cats, can be asymptomatic. However, FeLV can affect cats of any age or breed, and a significant number of older or healthy-looking cats can be carriers. Understanding the asymptomatic nature of FeLV is crucial for effective disease management and prevention in veterinary practices.