Based on field trials, USDA has granted a conditional license for a vaccine developed by Zoetis to prevent Porcine Epidemic Diarrhea virus (PEDv). Continued success in treatment as the vaccine is rolled out could lead to permanent approval. PEDv Vaccine Approved Based on field trials, USDA has granted a conditional license for a vaccine developed by Zoetis to prevent Porcine Epidemic Diarrhea virus (PEDv). Continued success in treatment as the vaccine is rolled out could lead to permanent approval. It is to be used in healthy pregnant female pigs and is designed to help them develop antibodies that can be transmitted to their newborn piglets. Zoetis anticipates the vaccine will be available to veterinarians and pig farmers this month. Acc...