Feline Rhinotracheitis, Calici, Panleukopenia, Chlamydia Psittaci Vaccine Killed Virus and Chlamydia For vaccination of healthy cats 8 to 10 weeks of age or older as an aid in the prevention of disease caused by feline rhinotracheitis, calici, panleukopenia viruses and feline Chlamydia psittaci. Directions: Inject one 1ml dose IM or SQ using aseptic technique. Repeat in 3 to 4 weeks. Annual revaccination with a single dose of vaccine is recommended.