Very low levels of IgG2 were detected in a 7 1/2 years old girl affected by recurrent pneumonias and atopic related disease. A similar clinical picture was present in two siblings (of 9 and 4 years old), although their of IgG subclass deficiencies is made, with special emphasis on IgG2 and their relationship with recurrent sinopulmonary infections, atopy and other immunodeficiencies.
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