Case fatality rates based on population estimates of influenza-like illness due to novel H1N1 influenza: New York City, May-June 2009.

PloS One
James L HadlerLorna E Thorpe

Abstract

The public health response to pandemic influenza is contingent on the pandemic strain's severity. In late April 2009, a potentially pandemic novel H1N1 influenza strain (nH1N1) was recognized. New York City (NYC) experienced an intensive initial outbreak that peaked in late May, providing the need and opportunity to rapidly quantify the severity of nH1N1. Telephone surveys using rapid polling methods of approximately 1,000 households each were conducted May 20-27 and June 15-19, 2009. Respondents were asked about the occurrence of influenza-like illness (ILI, fever with either cough or sore throat) for each household member from May 1-27 (survey 1) or the preceding 30 days (survey 2). For the overlap period, prevalence data were combined by weighting the survey-specific contribution based on a Serfling model using data from the NYC syndromic surveillance system. Total and age-specific prevalence of ILI attributed to nH1N1 were estimated using two approaches to adjust for background ILI: discounting by ILI prevalence in less affected NYC boroughs and by ILI measured in syndromic surveillance data from 2004-2008. Deaths, hospitalizations and intensive care unit (ICU) admissions were determined from enhanced surveillance including...Continue Reading

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Citations

Aug 17, 2011·Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America·Michael L JacksonStephanie J Schrag
Mar 25, 2014·Emerging Infectious Diseases·Roopa Kalyanaraman MarcelloJane R Zucker
Aug 2, 2011·Emerging Infectious Diseases·Christine H LeesRuth Lynfield
Sep 10, 2011·BMJ : British Medical Journal·A M PresanisD De Angelis
Feb 10, 2012·Journal of Urban Health : Bulletin of the New York Academy of Medicine·Heather E NarcisoJane R Zucker
Sep 21, 2013·Epidemiology·Jessica Y WongBenjamin J Cowling
Jan 22, 2011·Current Opinion in Infectious Diseases·Grant Waterer
Oct 8, 2013·Critical Care Clinics·Clare D Ramsey, Anand Kumar
Jun 1, 2013·Influenza and Other Respiratory Viruses·Anil SuryaprasadUNKNOWN American Indian and Alaska Native Pandemic Influenza A (H1N1) Investigation Team
Jul 8, 2015·Proceedings of the National Academy of Sciences of the United States of America·Max S Y LauSteven Riley
Jul 21, 2015·The European Journal of Health Economics : HEPAC : Health Economics in Prevention and Care·Nicolas Bouckaert, Erik Schokkaert
Apr 24, 2010·Epidemiology and Infection·K J JamesZ Skrabáková
Jun 26, 2020·Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America·Sten H Vermund, Virginia E Pitzer

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