What is it?
Feline leukemia virus is a retroviral infection that suppresses the immune system and increases the risk of cancer, anemia, and secondary infections.

How is it spread?
FeLV is transmitted through:

Kittens are especially susceptible.

Clinical signs may include:

Why vaccination is important:
FeLV is a leading cause of death in cats. Vaccination is recommended for all kittens and for adult cats with outdoor exposure or contact with other cats of unknown status.