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Safety and immunogenicity of 2009 pandemic influenza A H1N1 vaccines in China: a multicentre, double-blind, randomised, placebo-controlled trial

VaccinationVaccine SafetyCross-protectionInternational HealthPlacebo-controlled TrialVaccine EfficacyInfluenza VaccineFlu VaccinationPublic HealthVaccine HesitancyMedicineEpidemiologyInfluenza Vaccines