Selective IgA deficiency (sIgA-ID) is the most common well-defined primary immunodeficiency disorder, with a frequency reported to range between 1:328 in American blood donors and 1:18,500 in Japanese blood donors. We report here an epidemiologic study with a frequency of 0.61% (1:163), which is the highest prevalence of selective IgA deficiency reported in a healthy population.
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Fernández-Pereira et al. (1997) studied this question.
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