Most cafeteria plans offer two different flexible spending accounts; one is for qualified medical expenses and the other is for dependent care expenses. A few cafeteria plans offer other types of FSAs, especially if the employer also offers an HSA.
active immunity see acquired i. artificial immunity acquired (active or passive) immunity produced by deliberate exposure to an antigen, as in vaccination. cell-mediated immunity (CMI), cellular immunity acquired immunity in which the role of T lymphocytes is predominant.genetic immunity innate i.mmunity resulting from the development within the body of antibodies or sensitized T lymphocytes that neutralize or destroy the infective agent. This may result from the immune response to an invading organism or from inoculation with a vaccine containing a foreign antigen.
1 In the effector phase of the adaptive immune response, secretory antibodies prevent infection at mucosal surfaces of the respiratory tract, while circulating antibodies diffuse to and protect the lungs. 2  Cytotoxic T lymphocytes (CTLs) contribute to elimination of the infection by lysing virus-infected cells.igure 16 Immune responses to viral infections. Innate immune mechanisms include the production of cytokines and the activation of antigen-presenting cells (macrophages and dendritic cells) and natural killer (NK) cells.