Porcine reproductive and respiratory syndrome (PRRS) is a swine disease which appeared simultaneously in Europe (early 1990s) and North America (late 1980s) and continues to be one of the major diseases that affect the swine industry worldwide. PRRS is characterized by respiratory problems, like cough and dyspnea, in growing and finishing pigs and reproductive failure in sows, with late term abortion, stillbirth and increased preweaning mortality. In order to combat this disease, the implementation of control protocols (biosecurity and hygiene, immunization) is necessary together with PRRS...