Rogelio Pérez‐Padilla, Daniela de la Rosa‐Zamboni, Samuel Ponce de Leon, Mauricio Hernández et al.
BACKGROUND: In late March 2009, an outbreak of a respiratory illness later proved to be caused by novel swine-origin influenza A (H1N1) virus (S-OIV) was identified in Mexico. We describe the clinical and epidemiologic characteristics of persons hospitalized for pneumonia at the national tertiary ho...