1.Which lymphocyte has a role in both cell-mediated and humoral immunity? 2.Describe the development of antibodies to a specific antigen. 3. Predict why a person usually has chickenpox only once in a...

1.Which lymphocyte has a role in both cell-mediated and humoral immunity?

2.Describe the development of antibodies to a specific antigen.

3. Predict why a person usually has chickenpox only once in a lifetime but may have influenza many times.

4.Explain how the secondary response to an antigen is faster and greater than the primary response.