title: Problems of large scale influenza vaccine trials.
mesh_terms: D000917:Antibody Formation; D006805:Human Experimentation; D006801:Humans; D007252:Influenza Vaccines / Q000009:adverse effects / Q000627:therapeutic use*; D007251:Influenza, Human / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology / Q000517:prevention & control*; D009975:Orthomyxoviridae / Q000276:immunology; D014611:Vaccination
chemical_list: D007252:Influenza Vaccines