Estimation of division and death rates of lymphocytes in different conditions is vital for quantitative understanding of the immune system. Deuterium. in the form of deuterated glucose or heavy water. can be used to measure rates of proliferation and death of lymphocytes in vivo. https://www.jmannino.com/mega-choice-1st-Combat-Engineer-Battalion-Tonal-Patch-Graphic-T-shirt-big-savings/