 
			 
			MCQOPTIONS
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				| 1. | To detect a humoral immune response to influenza virus, it is possible to measure | 
| A. | cytotoxicity of virus-infected cells in tissue culture | 
| B. | dividing T cells in the draining lymph nodes | 
| C. | plasma cytokine levels | 
| D. | serum antibody titer | 
| Answer» E. | |