CD79A and shigellosis: Vaccinated subjects protected from shigellosis caused by S. flexneri 2a had significant increases in α4β7- ALS IgG responses 7 days post-first immunization as compared to unprotected vaccinees (p = 0·016 [T-Test]; Table 1 and Fig. 4c); however, a similar magnitude of increase in α4β7- ALS IgA responses was not observed (Table 1 and Fig. 4d).