infection with FVR. Studies have shown a duration of immunity of this vaccine to be at least three years. The use of serology to demonstrate circulating antibodies to FHV-1 has been shown to have a positive predictive value for indicating protection from this disease. Preventing spread of virus Most household disinfectants will inactivate FHV-1. The virus can survive up to 18 hours in a damp environment, but less in a dry environment and only shortly as an aerosol. See also Feline vaccination References External links Feline Upper Respiratory Disease from The Pet Health Library Cat diseases Animal viral diseases Herpesviridae