Prof. Dr. Hans Nauwynck

A new disease characterized by reproductive and respiratory problems emerged in Northern America and Western Europe in the late eighties, early nineties. It was caused by a porcine arterivirus, which based on the symptoms was called porcine reproductive and respiratory syndrome virus (PRRSV)(Meulenberg et al., 1993). On the two continents, two clearly different genetic/antigenic viruses were circu ...