This document discusses Porcine Reproductive and Respiratory Syndrome (PRRS), including its epidemiology, vaccination strategies, and control. It begins with an outline of the presentation topics, which include the disease profile, diagnostic protocol, and prevention/control strategies. It then discusses the typical and atypical forms of PRRS, describing symptoms, transmission patterns, and field observations. The document recommends vaccination programs for naive, stable positive, and unstable positive herds. It emphasizes that vaccination, close herd management, biosecurity programs, and best management practices are required to control PRRS.