1) Naïve T cells have the potential to differentiate into several types of effector cells. In the space below, describe the roles and activities of each of these cells:
?TH1 cells
TH2 cells
TH17 cells
TFH cells
2) Use the following diagram to compare and contrast systemic immunity and mucosal immunity.
?
Systemic Both Systemic and Mucosal Mucosal
?ordinary surface epithelia ? ?

Why is there a need for these differences in the first place?