When a tuberculin skin test is positive,what forms the hard center and erythema surrounding the induration?

Question

Quizplus · Accepted Answer

T lymphocytes and macrophages migrate to the site of the skin test antigen and release cytokines, triggering an immune response that results in the formation of a hard center (induration) and erythema surrounding it. The other options do not play a direct role in the formation of this reaction.

When a Tuberculin Skin Test Is Positive,what Forms the Hard