BATF3 and infection: During the first 3 weeks post-infection the percentage of Th2 cells in the spleen increased slowly in both Batf3−/− and B6 mice, but the proportion of Th2 cells in both Batf3−/− and B6 mice experienced a faster increase after 3 weeks, although there was still no significant difference between these two groups (F(7,14) = 0.02747, P = 0.8700) (Fig. 3c, d).