INFECTIOUS cDNA CLONES OF PORCINE REPRODUCTIVE AND RESPIRATORY SYNDROME VIRUS AND EXPRESSION VECTORS THEREOF

摘要

Infectious cDNA clones of North American Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) are provided. Further provided are cDNA clones comprising genetic mutations. Also provided are vaccines comprising cDNAs, including genetically and immunologically marked vaccines for North American PRRSV.