Epidemiological and clinical characteristics of 108 consecutive patients with influenza-like illness hospitalized in an infectious diseases unit during the 2009/10 wave of 2009 pandemic (A/H1N1) influenza.

NOTES:1Data refer to percent of total number of patients, unless otherwise specified.2Fever ≥38°C was a necessary criteria for defining an influenza-like syndrome and, consequently, for the inclusion in the study.3Other comorbidities: neurologic disease (1 patient), hypothyroidism (3 patients), hemoglobinopathy (2 patients), glucose-6-phosphate dehydrogenase deficiency (1 patient).4Percentage is calculated using the total number of pneumonia patients as denominator.BMI, body mass index; COPD, chronic obstructive pulmonary disease; HIV, human immunodeficiency virus; IQR, interquartile range; RT-PCR, reverse transcription polymerase chain reaction.