title: 2010-2011 influenza seasonal vaccine, preliminary mid-season effectiveness estimates: reason for concern, confounding or are we following the right track?
authors: J
authors: J
authors: Puig-Barberà
mesh_terms: D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage* / Q000276:immunology; D007251:Influenza, Human / Q000175:diagnosis / Q000517:prevention & control* / Q000821:virology; D012621:Seasons; D014611:Vaccination
chemical_list: D007252:Influenza Vaccines