Around this point in the infection, immature dendritic cells digest the pathogens and move from the lung tissue over to a nearby lymph node where they present the processed antigen on an MHC II protein to a naive T cell.

在感染进行到这一阶段时，未成熟的树突状细胞会消化病原体，然后从肺组织迁移到临近的淋巴结；在这里它们处理抗原至MHC II类分子，并呈递给初始T细胞。