Influenza & RSV Summary: Week 16 See full report Arizona reported Sporadic Activity for week 16. ADHS produces weekly reports on influenza and RSV (respiratory syncytial virus) to track the level of case activity, learn where influenza and RSV are occurring in the state as well as who is affected (e.g., age), and allows us the track what sub-types of influenza are circulating.  For more information on these reports visit our Influenza & RSV Reports page.  About the Data: 2020–2021 Influenza Season: The season is defined by surveillance weeks. The first day of the 2020–2021 influenza season was September 27th, 2020, or week 40 and the 2020–2021 surveillance season will continue through October 2nd, 2021, or week 39. Activity Levels: Indicator of the geographic spread of influenza activity. Widespread: Increased influenza-like illness from sentinel providers (ILI) in three or more regions and large numbers of laboratory-confirmed influenza cases in those regions. Regional: Increased ILI in two regions and elevated numbers of laboratory-confirmed influenza cases in those regions. Local: Increased ILI in one region and elevated numbers of laboratory-confirmed influenza cases in that region. Sporadic: No increase in ILI activity and only isolated laboratory-confirmed influenza cases. No Activity: No increase in ILI activity and no laboratory-confirmed influenza cases. Influenza-associated Pediatric Deaths: Influenza-associated pediatric deaths are reportable to the public health departments in Arizona.  The 2008–2009 and 2009–2010 seasons showed an increase in influenza-associated deaths in children related to the circulation of the 2009 H1N1 strain. One to five deaths were reported in each of the other seasons since 2004. Influenza-like illness: Defined as a fever of at least 100ºF plus either a cough or a sore throat. In weeks when a relatively low number of enrolled facilities report data, the ILI proportion may not be as representative of Arizona activity as for other weeks. The state ILI baseline is 1.9% and the epidemic threshold is 3.8%*. About us: The award-winning, nationally recognized Arizona Department of Health Services is responsible for leading Arizona's public health system including responding to disease outbreaks, licensing health and childcare facilities, operating the Arizona State Hospital, and improving the overall health and wellness of all Arizonans.

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