title: Phylogenetic evidence for a mild H1 pandemic in the early 1900s.
authors.affiliation: Medical Research Council Centre for Outbreak Analysis and Modelling, Department for Infectious Disease Epidemiology, Imperial College London, London W2 1PG, United Kingdom s.riley@imperial.ac.uk.
authors.forename: Steven
authors.initials: S
authors.lastname: Riley
mesh_terms: D000818:Animals; D006801:Humans; D009980:Influenza A virus / Q000235:genetics* / Q000276:immunology*; D064149:Influenza Pandemic, 1918-1919 / Q000401:mortality*; D007251:Influenza, Human / Q000401:mortality* / Q000821:virology*; D016865:Reassortant Viruses / Q000235:genetics*