Figure 1.

Major time points of Porcine Parvovirus (PPV) infection and immune response. The maternal antibodies protect the piglets passively (green line) until 9–22 weeks of age. The animals should be inoculated first after the depletion of maternal antibodies, and long-term immunity is maintained by booster vaccination. The embryos are susceptible to the infection (red line) until the Development of immune competence around day 70 day of gestation (green line). The consequences of the intrauterine infection depend on the time of the infection.