Background: The severity of the 2009 pandemic H1N1 influenza (H1N1 pdm 09) in immune deficient children is unknown. The aim of the present study was to investigate this in a case of complete IgG3 deficiency complicated by pneumonia and asthma attack.
Methods: The clinical parameters of the IgG3 deficiency patient were compared with those of four control patients using 95% confidence intervals.