A modified-live vaccine is a vaccine that uses live agents that are attenuated (modified in some way) to make it retain its immunogenicity and its ability to have limited replication in the host without producing illness.

Vanguard^® B (IN) Prescribing Information

Vanguard^® CV Prescribing Information

If your dog has missed a vaccination, received a vaccination outside of the labeled protocol or is
late for a booster shot, you will need to contact your attending veterinarian to determine a course
of treatment.

We have no safety or efficacy data to support the use of expired products.

The recommended minimum age for Vanguard products is 6 weeks except for Vanguard B which is 3 weeks and Vanguard CIV which is 8 weeks.

Zoetis sells only to licensed veterinarians.