Fig. 2.

Correlations between lymphocyte proliferative responses in mononuclear cells collected from mesenteric lymph nodes, blood and spleen from pigs inoculated with virulent or attenuated PEDV or mock-inoculated and protection against challenge 21 days later with virulent PEDV. Correlations were assessed by Spearman rank correlation test. Lymphocyte proliferative responses were expressed as mean cpm of PEDV stimulated wells versus mean cpm of control antigen stimulated wells, being cpm counts per minute.