Host defense mechanisms--the immune compromised host.
D000917:Antibody Formation; D003165:Complement System Proteins; D003428:Cross Infection / Q000517:prevention & control; D006801:Humans; D007109:Immunity; D007111:Immunity, Cellular; D007372:Interferons; D010587:Phagocytosis
D003165:Complement System Proteins; D007372:Interferons