(Boehringer Ingelheim) Fel-O-Vax IV + CaliciVax is a killed virus for protection against panleukopenia (cat distemper), calicivirus, rhinotracheitis and chlamydia. Protects against new hemorrhagic calicivirus strain VS-FCV. For cats 8 to 10 weeks of age, or older. Give SQ. Repeat in 3-4 weeks. Annual revaccination is recommended. Safe for pregnant queens. Ready to use liquid. Order syringes separately.