The effect of vaccination with commbinations of the three, commercial PRRSV vaccines on the development of neutralizing antibodies to antigenically different strains of PRRSV July 19, 2000
Evaluation of two procedures to aid in the diagnosis of PRRS in aborted fetuses and examination of the dynamic of PRRSV shedding in vaccinated and unvaccinated gilts infected with various doses of PRRSV July 30, 1999