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*[http://www.thepigsite.com/diseaseinfo/97/porcine-reproductive-respiratory-syndrome-prrs The Pig Site: Porcine Reproductive and Respiratory Syndrome]
 
*[http://www.thepigsite.com/diseaseinfo/97/porcine-reproductive-respiratory-syndrome-prrs The Pig Site: Porcine Reproductive and Respiratory Syndrome]
*[http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/54100.htm The Merck Veterinary Manual - Porcine Reproductive and Respiratory Syndrome}
+
*[http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/54100.htm The Merck Veterinary Manual - Porcine Reproductive and Respiratory Syndrome]
    
==References==
 
==References==
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