IAV-induced TFH cell dynamics in dLNs, spleen and lung1.

1Animals were given a 0.1LD50 dose of IAV i.n. on day 0. dLNs, spleen and lung were harvested on days 8–24 post-infection and TFH cell populations identified by flow cytometry based on their CD4+CD44hiCXCR5+CD150lo phenotype. Values represent mean ± SEM. n = 5–6 mice per group and time point.2Total number of TFH cells per spleen or lung; total number of TFH cells per node.3Ratio of GC B cells to TFH cells is based on total recovered GC and TFH cells per lung or spleen; dLN ratios were based on cell recovery per node.