Genetic Variability of PRRSV Vaccine Strains Used in the National Eradication Programme, Hungary
Porcine reproductive and respiratory syndrome (PRRS) is a globally spread, highly infectious viral disease.Live, attenuated vaccines against PRRS virus (PRRSV) decrease virus excretion and evoke protective immunity reducing the economic damage caused by the disease.In a longitudinal molecular epidemiological study accompanying ongoing national erad