/b/veterinary-news/posts/bovigen-scour-now-approved-for-single-shot-use Virbac's calf scour vaccine, Bovigen Scour, has been granted VMD approval for a single-shot vaccination protocol in pregnant cows and heifers, and had its shelf life extended to 3 years. Virbac says that this means that irrespective of previous vaccinationen-USTelligent Community 10