Which cell involved in immune function recognizes foreign peptides bound of MHC class II molecules on the surface of APC cells, secretes interleukin-2, and initiates the cell-mediated immunity reaction responsible for host-versus-graft reactions?

Which cell involved in immune function recognizes foreign peptides bound of MHC class II molecules on the surface of APC cells, secretes interleukin-2, and initiates the cell-mediated immunity reaction responsible for host-versus-graft reactions?

Which one of the following agents is able to suppress both B and T lymphocytes via its inhibition of de novo synthesis of purines?

In the treatment of acute inorganic arsenic poisoning, the most likely drug to be used is

A businessman intends to travel abroad in a geographical region where several diseases are endemic. He would not be able to be vaccinated against

A needlestick injury is sustained by a health care worker, and the blood is known to contain HBV surface antigens. The health care worker should be given