A historical,present day and futuristic viewpoint in the development and use of reagents and diagnostic tests for PRRSV will be presented.Cunently,PRRSV elimination and control programs are being implemented in the US.Even though PRRSV is not eliminated in the US,it should be noted that the causative agent of PRRSV was first identified only about 20 years ago.By comparison,in the US,pseudorabies (PRV) was discovered in swine in 1909 with eradication programs starting in 1989,with much of the eradication completed by 2005;classical swine fever (CSF/Hog cholera) was first reported in 1810 with much of the eradication completed between 1962 and 1976,and Brucellosis in swine was identified in 1914 and is nearly eradicated at this time.In these cases,between 100-200 years passed before elimination or near elimination was completed after identification of these swine pathogens.