At the Hipra seminar in Valburg, Gelderland, Hipra's Nauwynck discussed the strategies used by the PRRS virus to evade the pig's immune system, focusing on its ability to enter white blood cells and avoid detection. The virus's proteins and sugars enable attachment to white blood cells, and its RNA can be deciphered using whole genome sequencing. The virus's genetic variability was highlighted, with some proteins showing consistent codes while others do not, and not all mutations lead to increased virus aggressiveness. The event also covered the transportation of piglets and fattening pigs as a significant risk factor for virus spread, emphasizing the importance of biosecurity and compliance with regulations to prevent PRRS virus introduction and spread on farms.