Immunomodulation of Delayed-Type Hypersensitivity Responses by Mesenchymal Stem Cells Is Associated with Bystander T Cell Apoptosis in the Draining Lymph Node.

(Lim et al. J Immunol) Immune responses are quantified in many ways. Typically one thinks about immunity as the ability of an organism to overcome infection with another organism. However this test is impossible to perform in a reproducible, quantitative, and ethical way in humans. An alternative test was developed by immunologists called delayed type…