Antigenic drift in influenza is a result of which of the following processes

Mycobacteria tuberculosis is a bacterial pathogen that  has evolved to  evade the immune system detection. Which of the following mechanism is used by this organism? 

Shigella escapes immune response by

Match the following gene defects with the associated primary immunodeficiency

B cell activation and differentiation ensues after HIV entry into host

Oral inoculation with rotavirus, an intestinal pathogen, induces adaptive immune responses that are initiated in gut-associated lymphoid tissue, such as mesenteric lymph nodes and Peyer’s patches. The rotavirus-specific effector T cells that are generated in this response are never found in the circulation, but home directly from the lymphoid tissue to the epithelium without ever leaving the intestinal environment.

Which of the following contribute to dendritic cells tolerance in mucosal immunity?

Pathogens are taken up using the following mechanisms EXCEPT:

Match each chemokine receptor to its tissue homing function

Important information can be learned by studying the immune system of female carriers of the XLA disease gene. These individuals show random X chromosome inactivation in their T cells and macrophages among other cells. This finding indicates that: