In humoral immunity, the body's lymphocytes produce antibodies, which bind to antigens and label it for destruction. In a sense the body is attacking from a distance, making antibodies and sending them out. In Cell mediated immunity, the cells patrol the body directly looking for bad cells and destroying them directly. However, they do not produce antibodies.
References:
http://www.mansfield.ohio-state.edu/~sabedon/biol2075.htm
http://www.cehs.siu.edu/fix/medmicro/cmir.htm
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