/b/veterinary-news/posts/zoetis-steps-up-production-of-its-marek-s-disease-vaccine Zoetis has ramped up production of its Marek’s disease vaccine. Poulvac CVI + HVT Marek’s vaccine provides the combination of the Rispens CVI strain and the HVT strain. Zoetis says this combination of serotypes has long been recognised for providingen-USTelligent Community 10