An attempt was made to see if there is any correlation between the trace element concentrations in the human blood serum and
some specific disease. The serum samples of the patients suffering from cancer, Down syndrome, and Banti syndrome were analyzed
by the neutron activation method and compared with the trace element concentrations observed among the clinically healthy
men. The cancer patients gave below normal concentrations in Rb, Mn, Fe, Co, Cu, Zn, Al and Se. The Down syndrome patients
were found to have similar deficiencies in Cr, Mn, Fe, Co, Zn, Cu and Sb.