SOLO JEC Feline 3 is for the vaccination of healthy, susceptible cats 8 weeks and older to aid in the prevention of Feline Rhinotracheitis, Calicivirus,Panleukopenia, With SOLO JEC Feline 3, it only takes a few moments to vaccinate your cats easily and safely. Protect your cats and avoid costly medical care to treat a vaccine-preventable disease.