Following the expansion of T cells that have been generated as part of an immune response to a pathogen, the immune system returns to homeostasis which involves the loss of most of the pathogen specific T cells. The primary reason that this occurs is:

Question

Following the expansion of T cells that have been generated as part of an immune response to a pathogen, the immune system returns to homeostasis which involves the loss of most of the pathogen specific T cells.  The primary reason that this occurs is:

Accepted Answer

The source of antigen to maintain proliferation is reduced or absent

Answer

Innate cells (especially neutrophils) recruited to the site of infection by helper T cells, will kill these cells after responding to the pathogen

Answer

B cells out-compete T cells in the lymph node so that sufficient antibody concetrations can be generated

Answer

T cells generated through clonal expansion have a short (~7-10 day) lifespan

Crowdly

Following the expansion of T cells that have been generated as part of an immune...

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