a complex of viral contagions of cats (feline) (including rhinotracheitis, pneumonitis, and influenza), marked by fever, sneezing, and running eyes and nose. Rhinotracheitis and pneumonitis are the most common and have identical symptoms. Mortality is low, but recovery from severe cases may be difficult and prolonged, with relapses. A vaccine is available against pneumonitis. Treatment is supportive. Antibiotics are used to prevent secondary bacterial infections.