CD40LG and infection: In both PCV2a and PCV2b/d groups (see Table 2 and Table 3), we observed that the infection was successful as each pig individually mounted an anti-PCV2 IgM response to the injected recombinant PCV2a or PCV2b/d genotype group members between the 20-day post-transfection (p.t.)and 41-day p.t. period.