Heterologous challenge with porcine reproductive and respiratory syndrome (PRRS) vaccine virus: no evidence of reactivation of previous European-type PRRS virus infection

Author: Botner A.   Nielsen J.   Oleksiewicz M.B.   Storgaard T.  

Publisher: Elsevier

ISSN: 0378-1135

Source: Veterinary Microbiology, Vol.68, Iss.3, 1999-08, pp. : 187-195

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