Which symptom or observation would support the hypothesis that a person is undergoing an adaptive immune response after exposure to a pathogen?

Question

Quizplus · Accepted Answer

Lysis of infected cells by T cells indicates that a person is undergoing an adaptive immune response, specifically cell-mediated immunity where T cells destroy infected cells. This is a specific defense mechanism that requires recognition of the pathogen by the immune system and the activation of T cells to target and kill the infected cells. Choices A, B, and C are more general defense mechanisms that can also occur in response to non-specific or innate immune responses. Choice E could also occur in both innate and adaptive immune responses as phagocytosis is a general mechanism of the immune system.

Which Symptom or Observation Would Support the Hypothesis That a Person