Groups at high risk for severe disease and complications secondary to 2009 pandemic H1N1 influenza A include patients with underlying pulmonary (asthma) and cardiac comorbid conditions, some immunosuppressive states, pregnancy and post-partum states, diabetes mellitus, obesity [13, 14] , and, in children, prior neurological disabilities [15] . Severe primary H1N1 influenza pneumonia can also affect young adults without any underlying comorbidities [14] .