alterations in the functional capacity of the immune system were measured using the graft-versus-host reaction , the response of peripheral blood lymphocytes ( pbls ) to mitogens , the ability of circulating monocytes to phagocytize latex beads , and the serological responses to newcastle disease virus , sheep red blood cells , and brucella abortus antigens .
C0020962
immune system
C1518997
peripheral blood lymphocytes