title: How to maintain surveillance for novel influenza A H1N1 when there are too many cases to count.
authors.affiliation: Center for Communicable Disease Dynamics, Department of Epidemiology, Department of Immunology and Infectious Diseases, Harvard School of Public Health, Harvard University, Boston, MA 02115, USA. mlipsitc@hsph.harvard.edu
authors.forename: Marc
authors.initials: M
authors.lastname: Lipsitch
authors.forename: Frederick G
authors.initials: FG
authors.lastname: Hayden
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Cowling
authors.forename: Gabriel M
authors.initials: GM
authors.lastname: Leung
mesh_terms: D017281:Cost of Illness; D003625:Data Collection; D018563:Disease Notification / Q000379:methods; D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D055317:Evidence-Based Practice; D014943:Global Health; D006301:Health Services Needs and Demand; D006801:Humans; D015994:Incidence; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000175:diagnosis / Q000453:epidemiology* / Q000821:virology*; D011159:Population Surveillance / Q000379:methods*; D015980:Public Health Practice; D012621:Seasons; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D014773:Virology / Q000379:methods*