By means of immunological methods, it was demonstrated that the herb natural cordyceps sinensis and its artificially cultured mycelia showed a marked effect on the immuno-organs of mice. It produced enlargement of the spleen and the liver, atrophy of the thymus, enhancement of phygocytosis of Kupffers' cells, and proliferation of macrophages in the spleen. All these findings suggested that the fuctions of monocyte-macrophage system were activated. There was no significant difference between the natural herb...