
Keywords: Th1; type 1 T helper cells; Th2; type 2 T helper cells; CNS; central nervous system; BBB; blood-brain barrier; IL-2; interleukin-2; IL-12; interleukin-12; IL-10; interleukin-10; IL-4; interleukin-4; IL-6; interleukin-6; TNF-α; tumor necrosis factor a