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Pediatrics Primary Immunodeficiency bbc60e1e

The commonest primary immunodeficiency is?

A
Common variable immunodeficiency
B
Isolated IgA immunodeficiency
C
Wiskott-Aldrich syndrome
D
AIDS
High-Yield Explanation
Isolated IgA Deficiency: commonest immunodeficiency (1/600) Affected individuals have extremely low levels of both serum and secretory IgA C/F: asymptomatic, recurrent respiratory infections

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