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T cells homing to gut and those homing to skin can be differentiated by:

As AIDS pogresses, the quantity of ______ diminishes, and the risk of opportunistic infections increases.

In the absence of disease, large numbers of effector TH17 cells are abundant in the intestinal lamina propria. In a healthy individual, these TH17 cells

The NOD and NOD-like receptor proteins are expressed on the surface of intestinal epithelial cells where they bind to extracellular bacteria and induce cytokine production.

The HIV lymphocyte-tropic stain bind to ______ co-receptor on CD4 T cells:

An antigenic drift occurs every 10 -50 years

Which of the following is an incorrect statement

Bone marrow transplantation:

Antigenic shift in influenza is a result of which of the following processes?

MALT contains large numbers of effector cells, even in the absence of pathogen