Porcine circovirus type 2 (PCV2)-infection and re-inoculation with homologous or heterologous strains: virological, serological, pathological and clinical effects in growing pigs
Tanja Opriessnig, John R. Prickett, Darin M. Madson, Hui-Gang Shen, Nicole M. Juhan, Roman M. Pogranichniy, Xiang-Jin Meng and Patrick G. Halbur