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Influenza Season 2012-2013 IHS Update December 13 th , 2012. Flu View. Flu View. Circulating flu viruses. Influenza activity is increasing, particularly in some regions Indication is that we will have an early flu season H3N2 is the predominant circulating strain
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Circulating flu viruses • Influenza activity is increasing, particularly in some regions • Indication is that we will have an early flu season • H3N2 is the predominant circulating strain • Typically H3N2 seasons are more severe, but too soon to know about severity for this year • Circulating flu viruses are good match with both influenza A and influenza B vaccine strains
U.S. Influenza vaccination coverage by age group, early 2012-13 season, National Immunization Survey and National Internet Flu Survey‡ * All percentages in the table are weighted to the U.S. population. † CI=Confidence interval half-width ‡ Child estimates calculated from the National Immunization Survey, adult estimates calculated from the National Internet Flu Survey http://www.cdc.gov/flu/fluvaxview/nifs-estimates-nov2012.htm
IHS Influenza Awareness System (IIAS)Influenza-Like-Illness by Flu Season, Week 49
Influenza Vaccine Coverage Estimates *Based on CDC data. Adult vaccine coverage is based on self reported vaccination status. ** Based on the IHS Influenza Awareness System, Active Clinical User. Vaccine coverage is based on vaccination status documented in the medical record.
Summary • Influenza activity is increasing • IHS Influenza vaccine coverage is LOWER compared to same time period last year • Many people remain unvaccinated! • I/T/U sites should run their influenza coverage reports WEEKLY and follow up with people who have not yet been vaccinated