Porcine circovirus type 2: success and failure

Caroline Fossum : Section of Immunology, Department of Biomedicine and Veterinary Public Health, SLU, Uppsala, Sweden Introduction Vaccination against porcine circovirus type 2 (PCV2) reduces the incidence and severity of porcine circoviral disease (PCVD),  in particular the postweaning multisystemic wasting syndrome  (PMWS). This confirms that PCV2 is the essential infectious agent  in this disease syndrome, but attempts to elucidate why PMWS became an emerging disease have fai