Feline herpes (FHV-1) is not contagious to humans. The virus is species-specific, meaning it can only infect cats and cannot replicate in human cells. If your cat has been diagnosed with feline herpesvirus, you don’t need to worry about catching it yourself or passing it to other family members.
Why Feline Herpes Can’t Infect Humans
Feline herpesvirus type 1 (FHV-1) and human herpes simplex virus (HSV-1) are related but distinct viruses. Both belong to the same broader family, which is why they share a name, but they evolved to target different hosts. FHV-1 attaches to cat cells using specific surface proteins that interact with receptors on feline tissue. Human cells don’t have the right configuration of receptors for FHV-1 to latch onto, enter, and reproduce. Without the ability to get inside your cells, the virus simply can’t establish an infection.
This works both ways. You can’t give your cat a human cold sore (HSV-1), and your cat can’t give you feline herpes. The species barrier is firm, and there are no documented cases of cross-species transmission between cats and humans for either virus.
What Feline Herpes Does to Cats
While harmless to you, FHV-1 is extremely common in cats and can cause significant discomfort. It primarily attacks the upper respiratory tract and eyes. Typical signs include sneezing, nasal congestion, fever, lethargy, and poor appetite. Eye symptoms are often the most prominent: conjunctivitis, excessive blinking, squinting, and discharge that ranges from clear and watery to thick yellow-green pus. In more serious cases, the virus causes corneal ulcers, which appear as branching, tree-like patterns on the surface of the eye. These dendritic ulcers are a hallmark of feline herpes and are one of the clearest diagnostic signs.
Less commonly, cats develop oral ulcers, skin lesions, or facial dermatitis. Secondary bacterial infections frequently develop on top of the viral illness, turning thin nasal discharge into thick, purulent mucus. Kittens tend to get hit hardest, with more severe respiratory and eye disease than adult cats.
The Carrier Problem
Nearly all cats that recover from an active FHV-1 infection become lifelong carriers. The virus goes dormant, hiding in nerve tissue where the immune system can’t eliminate it. Stress is the most common trigger for reactivation: a move to a new home, the introduction of a new pet, boarding, surgery, or illness can all bring symptoms roaring back. During reactivation, a cat sheds the virus and can infect other cats even if its symptoms look mild.
Recurring eye problems are the most frequent consequence of this latency cycle. Many carrier cats deal with repeated bouts of conjunctivitis, corneal inflammation, or chronic sneezing and nasal discharge throughout their lives.
How It Spreads Between Cats
FHV-1 spreads through direct contact with an infected cat’s saliva, nasal secretions, or eye discharge. Shared food bowls, bedding, and litter boxes can also transmit the virus, though the window is short. FHV-1 survives only about 18 hours in a damp environment and even less in dry conditions. It’s also fragile as an airborne particle. Standard household disinfectants readily destroy it on surfaces.
If you have multiple cats and one is diagnosed with feline herpes, isolating the sick cat, washing your hands after handling it, and cleaning shared items with a basic bleach solution will help protect your other cats. These precautions are entirely about cat-to-cat transmission, not about protecting yourself.
Vaccination for Cats
The FHV-1 vaccine is classified as a core vaccine, meaning it’s recommended for all cats regardless of lifestyle. Kittens receive a series of shots every three to four weeks until they’re 16 to 20 weeks old, with a booster around six months. After that, adult cats get revaccinated every one to three years depending on the type of vaccine used (intranasal versions are given annually, while injectable versions may go three years between boosters).
The vaccine doesn’t completely prevent infection but significantly reduces the severity of symptoms. Intranasal versions offer faster protection against respiratory disease, which makes them particularly useful in shelters and high-risk environments.
Zoonotic Risks That Can Look Similar
While feline herpes itself poses no risk to you, cats do carry some organisms that can affect humans. The bacterium Pasteurella multocida lives in the mouths of 70 to 90 percent of cats. It doesn’t cause illness in cats, but if a cat bites you and breaks the skin, the wound can become infected within 24 to 48 hours, causing pain, swelling, and redness. Most Pasteurella infections respond well to antibiotics, though in rare cases the bacteria can spread through the bloodstream.
If your cat is sick with respiratory symptoms and you’re also feeling unwell, the two are almost certainly unrelated. You may have picked up a human cold virus on your own. The exception would be something like a secondary bacterial infection from a bite or deep scratch, which has nothing to do with the herpes virus itself.