Aggressive Flu Strain Arrives Early And Spreads Rapidly Through U.S.

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Dr. Anne Furey Schultz examines a patient complaining of flu-like... Fotografía de noticiasAsistencia sanitaria y medicina,Chicago,Clínica,Doctor,EE.UU.,Encuadre cintura para arriba,Enfermedad,Examen médico,Examinar,Gripe,Horizontal,Illinois,Maryland - Estado,Paciente,Quejándose,SíntomaPhotographer Collection: Getty Images News 2013 Getty ImagesCHICAGO, IL - JANUARY 10: Dr. Anne Furey Schultz examines a patient complaining of flu-like symptoms at Northwestern Memorial Hospital on January 10, 2013 in Chicago City. According to the Centers for Disease Control and Prevention flu is widespread in 41 states. The CDC has reported 22,048 flu cases from Sept. 30 through December 31, 2012 compared with only 849 for the same period last year. (Photo by Scott Olson/Getty Images)