Most T cells will leave the thymus after showing that they can react to self cells.
Few (about 5%)of T cells will leave the thymus after showing that they can react to self cells.

Question

Quizplus · Accepted Answer

The majority of T cells are actually eliminated during thymic selection because they recognize self-antigens too strongly, while only a small minority (about 5%) are able to bind to self-antigens with low enough affinity to survive and leave the thymus as mature T cells.

Most T Cells Will Leave the Thymus After Showing That