Veterinarians have uncovered seven cases of dog flu in Florida two years after the potentially fatal disease swept through about 10 states, Florida health officials said.

The Florida Department of Agriculture and Consumer Services said the cases of H3N2 canine influenza were found at the University of Florida, which listed another six pending cases of the disease.

The “highly contagious” virus infected about 1,000 dogs in Chicago in 2015, with positive diagnoses occurring in a number of other states. Officials said it’s the first time the disease has been found in Florida.

The dogs are reported in stable condition.

The University of Florida College of Veterinary Medicine reported there is no evidence the disease can infect humans, but it can spread to cats. It exists in the animal’s respiratory tract, causing coughing, sneezing, fever and life-threatening pneumonia. Most dogs are treated at home, although the disease sometimes requires hospitalization.

The disease can result in death.

Dog flu can spread by direct or indirect contact with humans or places already contaminated by the disease. Dogs most at risk are those around other dogs at dog parks, grooming parlors and veterinary clinics. Most dogs aren’t immune to the disease, although a vaccination exists.

The disease is so easily spreadable that UF advises those who suspect their pet has the disease to not take their dog into a veterinarian waiting room. Instead, the dog should enter through a separate entrance and the entire area should be disinfected before another animal enters.

The U.S. Centers for Disease Control and Prevention stated that the disease is an avian flu virus that adapted and spread to dogs. It was first detected in South Korea in 2007 before making its way to the United States in 2015.