title: Reply to Collignon et al.
authors.affiliation: School of Public Health.
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Cowling
authors.affiliation: School of Public Health Centre of Influenza Research, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China.
authors.forename: J S Malik
authors.initials: JS
authors.lastname: Peiris
authors.affiliation: School of Public Health.
authors.forename: Gabriel M
authors.initials: GM
authors.lastname: Leung
mesh_terms: D005260:Female; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage* / Q000276:immunology*; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control*; D008297:Male
chemical_list: D007252:Influenza Vaccines