Feline Immunodeficiency Virus (FIV) is a viral infection that affects cats, similar to HIV in humans. It attacks the immune system, making infected cats more susceptible to other infections and diseases. FIV is primarily spread through bite wounds, so outdoor cats that fight are at higher risk. Symptoms of FIV can take years to appear, and many cats may live healthy lives for a long time after infection. Regular veterinary check-ups and a healthy lifestyle can help manage the condition. There is no cure for FIV, but infected cats can still lead fulfilling lives with proper care and attention.