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The Marin County Department of Health and Human Services conducts local influenza surveillance during flu season each year and offers periodic updates to you, our healthcare providers.
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During the fourth week of January, influenza was circulating in Marin County, with elevated influenza-like illness activity (Figure 1) and percent positive of influenza tests (Figure 2).
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Influenza-like illness activity: Influenza-like illness activity began increasing during the week of December 17-23, 2017, and has remained elevated through the week of January 21, 2017. Discharge data from Kaiser San Rafael, Marin General Hospital, and Novato Community Hospital emergency departments and showed the percentage of visits associated with influenza-like illness (ILI) was 11.9% during the week of January 21-27, 2017. See Figure 1 below.
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Figure 1. Proportion of Visits due to Influenza-Like Illness (ILI):
Kaiser San Rafael, MGH, and NCH Emergency Departments , 2015-16, 2016-2017, and 2017-2018 Influenza Seasons
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Influenza testing: During the week of January 21-27, 2018, 41 (20.3%) of the 202 specimens tested for influenza were positive. Of the positive specimens from January 21-27 , 27 (65.9%) were influenza A and 14 (34.1%) were influenza B. During this influenza season through January 27, 447 specimens have tested positive for influenza. See Figure 2 below.
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Figure 2. Influenza Tests in Marin County, 2017-2018 Influenza Season
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PROVISIONAL DATA, SUBJECT TO CHANGE.
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Visit MarinFlu.org for influenza vaccination, testing, and treatment recommendations.
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Copyright © 2018