ArticleInfluenza and other respiratory viruses2011
Preliminary results of 2009 pandemic influenza surveillance in the United States using the Aggregate Hospitalization and Death Reporting Activity.
Article in Influenza and other respiratory viruses, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- System for rapid assessment of pneumonia and influenza-related mortality-Ohio, 2009-2010.American journal of public health · 2015Article
- Mortality burden of the 2009-10 influenza pandemic in the United States: improving the timeliness of influenza severity estimates using inpatient mortality records.Influenza and other respiratory viruses · 2013Article
- Age- and sex-specific mortality associated with the 1918-1919 influenza pandemic in Kentucky.The Journal of infectious diseases · 2013Article
- Epidemiology of influenza A (H1N1)pdm09-associated deaths in the United States, September-October 2009.Influenza and other respiratory viruses · 2012Article
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Abstract
backgroundTo augment established influenza surveillance systems in the United States, the Centers for Disease Control and Prevention and the Council of State and Territorial Epidemiologists implemented the Aggregate Hospitalization and Death Reporting Activity (AHDRA) in August 2009. The AHDRA was designed to meet increased demands for timely and detailed information describing illness severity during the 2009 H1N1 influenza A (pH1N1) pandemic response.
objectivesWe describe the implementation of AHDRA and provide preliminary results from this new surveillance activity.
methodsAll 50 US states were asked to report influenza-associated hospitalizations and deaths to AHDRA each week using either a laboratory-confirmed or syndromic surveillance definition. Aggregate counts were used to calculate age-specific weekly and cumulative rates per 100,000, and laboratory-confirmed reports were used to estimate the age distribution of pH1N1 influenza-associated hospitalizations and deaths.
resultsFrom August 30, 2009, through April 6, 2010, AHDRA identified 41,689 laboratory-confirmed influenza-associated hospitalizations and 2096 laboratory-confirmed influenza-associated deaths. Aggregate Hospitalization and Death Reporting Activity rates peaked earlier than hospitalization and death rates seen in previous influenza seasons with other surveillance systems, and the age distribution of cases revealed a tendency for hospitalizations and deaths to occur in persons <65 years for age.
conclusionsAggregate Hospitalization and Death Reporting Activity laboratory-confirmed reports provided important information during the 2009 pandemic response. Aggregate Hospitalization and Death Reporting Activity syndromic reports were marked by low representativeness and specificity and were therefore less useful. The AHDRA was implemented quickly and may be a useful surveillance system to monitor severe illness during future influenza pandemics.
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