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Epidemiological studies on the associations between ABO blood group antigens, secretor status and susceptibility to infectious agents are summarized. Evidence for association of non-secretion with some autoimmune diseases for which infectious aetiologies have been proposed is also given. Several hypotheses are proposed to explain the host-parasite interactions underlying the epidemiological observations, and evidence to support or refute them is presented.
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C C Blackwell (1989) studied this question.
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