Alandmark anniversary in pig health occurs this year as it is 30 years since the first pigs in the United States suffered a previously unknown disease that we now call the porcine reproductive and respiratory syndrome or PRRS.After the arrival of PRRS as a clinical entity in US pigs in 1987, a similar syndrome emerged in Europe by 1990 and Asian countries started to see outbreaks about a year later. By 1995 the disease was generally considered to be endemic throughout pig-producing territories on three continents.The past three decades have brought a series of milestones or key moments in the development of our knowledge about what causes the disease and how to control it. The battle against PRRS continues and it remains probably the most economically damaging pig disease at world level.This anniversary prompts us to reflect on those milestones and what we have learned regarding PRRS control strategies both in individual herds and in zones or regions.
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