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Cat Health

6 Things to Know About Feline Immunodeficiency Virus (FIV)

Lauren Smith, MAKaren Hovav, MD, FAAP
Written by Lauren Smith, MA | Reviewed by Karen Hovav, MD, FAAP
Updated on December 10, 2025
Reviewed by Karen Hovav, MD, FAAP | December 10, 2025

Feline immunodeficiency virus, or FIV, affects up to 3 percent of cats in the United States, according to the Cornell Feline Health Center at Cornell University's College of Veterinary Medicine. Like HIV in humans, FIV weakens the immune system over time, causing the kitty to be more vulnerable to all types of infections.

But also like HIV, being diagnosed with FIV is not a “death sentence.” However, it can impact your cat’s health and quality of life, especially if it goes untreated or undetected. If your cat has been diagnosed with feline immunodeficiency virus, or if you are considering adopting a cat who is FIV-positive, here’s what you need to know.

References

Cornell Feline Health Center. (2021). Feline immunodeficiency virus. Cornell University College of Veterinary Medicine.

Weir, M., et al. (n.d.). Feline immunodeficiency virus. VCA Hospitals.

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Lauren Smith, MA
Written by:
Lauren Smith, MA
Lauren Smith, MA, has worked in health journalism since 2017. Before joining GoodRx, she was the senior health editor and writer for HealthiNation.
Karen Hovav, MD, FAAP, has more than 15 years of experience as an attending pediatrician. She has worked in a large academic center in an urban city, a small community hospital, a private practice, and an urgent care clinic.

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