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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 first week of April, 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 remains elevated in Marin County. Flu activity remains above expected levels for this time of year. Discharge data from Kaiser San Rafael, Marin General Hospital, and Novato Community Hospital emergency departments showed the percentage of visits associated with influenza-like illness (ILI) was 7.49% during week 14 (March 31 - April 6). 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, 2016-17, 2017-2018, and 2018-2019 Influenza Seasons
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Influenza testing: During week 14 (March 31 - April 6), 41 (28.7%) of the 143 specimens tested for influenza were positive. Of the positive specimens from week 14, 40 (97.6%) were influenza A and 1 (2.4%) were influenza B. During this influenza season through April 6, 467 specimens have tested positive for influenza. See Figure 2 below.
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Figure 2. Influenza Tests in Marin County, 2018-2019 Influenza Season
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Visit MarinFlu.org for influenza vaccination, testing, and treatment recommendations.
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Copyright © 2018