“…The MER fraction of phenol-killed BCG (Phipps strain) w%as used in these experiments. MER has been previously show,n to possess nonspecific humoral and cellular immunological adjuvant properties in a variety of animals (Ben-Efraiin et al, 1973;Kuperman et al, 1972), and has recently been used successfully in tumour immunotherapy in both animals and man (Hopper et al, 1975;Cohen et al, 1975;Weiss et al, 1975). MER was a gift from the division of Cancer Treatment, National Cancer Institute, Bethesda, Md.…”