What is Feline Herpes Virus? Feline Herpes Virus (FHV) is a major cause for conjunctival and corneal disease in cats and is one of the most frustrating diseases to manage for the cat, owner, and veterinarian. Infection with FHV is common and affects greater than 90% of the cat population. The virus cannot be cured, but it can go into latency, or “remission”, where it can become active periodically throughout a cat’s life. There are some cats that have FHV but never display ac