I don't know too much about this aside from reading the article, but my friend who just graduated from Penn Vet school posted it and thought you all might be interested! I'm a little surprised at the brevity of the trials: 18 dogs in a clinical trial, now being sold at 24 clinics, and then (depending on results), potentially country-wide? Though it does note results from "a separate field of study" so this article is probably not including all trials done.

USDA Grants Canine Osteosarcoma Vaccine With Conditional License