2017 AAHA Canine Vaccination Guidelines
Vaccine handling & storage
1. For how long can a reconstituted modified-live virus (MLV) vaccine remain at room temperature without losing activity?
At room temperature (e.g., 60°–80°F), some of the more sensitive MLV vaccines (especially CDV vaccine) may lose the ability to immunize within 2 to 3 hr following reconstitution. It is recommended that unused MLV vaccines be discarded 1 hr after reconstitution regardless of whether or not the product has been refrigerated.