During a laboratory experiment, a group of students is study…

During a laboratory experiment, a group of students is studying the activation of T-cells in response to a viral infection. They discover that helper T-cells play a crucial role in activating other immune cells. What is the primary function of activated helper T-cells?

A child is suspected of having an inherited humoral immunode…

A child is suspected of having an inherited humoral immunodeficiency disease and is given a diphtheria/tetanus vaccine. Four weeks after the immunization his level of antibodies to the specific antigens in the vaccine are measured. Which result is expected?