CD4 and measles: T/B cell lymphopenia, retarded T cell proliferation in response to nonspecific mitogens [17], a prolonged cytokine imbalance in favor of T helper 2 (TH2)-type and anti-inflammatory mediators [e.g., interleukin (IL)-4, IL-13 and IL-10] [18,19], and CD4+CD25+ regulatory T cell accumulation in the peripheral blood [20] are among other immunological consequences of measles.