MEXICO CITY, Nov. 12 (UPI) -- This spring when H1N1 flu first surfaced in Mexico younger people were hit the hardest, however, the elderly had a higher risk of dying, researchers said.
First author Dr. Santiago Echevarria-Zuno of the Instituto Mexicano del Seguro Social in Mexico City and colleagues analyzed information gathered by the influenza surveillance system from April 28 to July 31 for patients with influenza-like illness who attended clinics that were part of the Mexican Institute for Social Security network.