With increasing concern over the spread of the pandemic H1N1 2009 influenza virus infection worldwide, detailed knowledge of both its clinical and radiologic features can assist the clinical practice and decision-making of physicians facing this emerging pandemic infectious disease. In addition, preparation for this pandemic infectious disease among institutionalized populations in semi-closed settings such as schools, dormitories, military barracks, or prisons should be made since this infection can spread very rapidly and may quickly become unmanageable without prompt and proper management in the early stages of disease spread. In this study, we attempt to describe one incidence of a military outbreak of the pandemic H1N1 2009 influenza virus with a focus on the clinical and radiological features of these patients, as well as the outcome of treatment.