1 / 11

U.S. Influenza Surveillance

U.S. Influenza Surveillance. Lisa Grohskopf, MD, MPH Medical Officer Influenza Division Centers for Disease Control and Prevention. National Center for Immunization & Respiratory Diseases. Influenza Division. VRBPAC Meeting February 25, 2011.

vine
Download Presentation

U.S. Influenza Surveillance

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. U.S. Influenza Surveillance Lisa Grohskopf, MD, MPH Medical Officer Influenza Division Centers for Disease Control and Prevention National Center for Immunization & Respiratory Diseases Influenza Division VRBPAC Meeting February 25, 2011

  2. Characteristics of Recent Influenza Viruses Tested at CDC Of 644 U.S. viruses antigenically characterized at CDC since October 1, 2010: • 85 (13%) Influenza A (H1N1) • 85 (100%) A/California/7/2009-like • 348 (54%) Influenza A (H3N2) • 345 (99%) A/Perth/16/2009-like • 211 (33%) Influenza B • 199 (94%) Victoria lineage; 198 (99%) B/Brisbane/60/2008-like • 12 (6%) Yamagata lineage High level resistance to adamantanes persists among Influenza A isolates; A(H1N1), A(H3N2) and B virus isolates tested remain susceptible to neuraminidase inhibitors

  3. Percentage of Visits for Influenza-like Illness (ILI) Reported by the U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet), Weekly National Summary, September 30, 2007 – February 12, 2011

  4. Influenza Positive Tests Reported to CDC by U.S. WHO/NREVSS Collaborating Laboratories, National Summary, 2010-11 Number of Positive Specimens Percent Positive

  5. Pneumonia and Influenza Mortalityfor 122 U.S. CitiesWeek Ending 02/12/2011 EpidemicThreshold SeasonalBaseline 2006 2007 2008 2009 2010 2011

  6. Deaths Reported Previous Week Deaths Reported Current Week Number of Influenza-Associated Pediatric Deaths by Week of Death: 2007-08 season to present 2009-10 Number of Deaths Reported = 282 2010-11 Number of Deaths Reported = 35 2008-09 Number of Deaths Reported = 133 2007-08 Number of Deaths Reported = 88

  7. Key Points • Influenza A(H3N2), A(H1N1), and B strains continue to co-circulate in the U.S. • Recently characterized strains appear to be well-matched to the recommended 2010-2011 seasonal vaccine • Recently circulating viruses remain susceptible to neuraminidase inhibitors • In the U.S., influenza activity remains high in recent weeks • Increase in proportion of influenza A viruses identified as A(H1N1) since the beginning of the U.S. season

More Related