PRRS – past, present and future

It is too simple to speak of ‘just’ Porcine Reproductive and Respiratory Syndrome (PRRS). History teaches us that the virus changes and various types and subtypes have their own specific characteristics. How can this knowledge help to beat the virus? By Dr Hans Nauwynck, Laboratory of Virology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium A new disease characterised by reproductive and respiratory problems emerged in Northern America and Western Europe in the late 198