Influenza Activity - Previous Years

Archive of influenza statistics.

On this page:
2014-15
2013-14
2012-13
2011-12
2010-11
2009-10
2008-09
2007-08
2006-07
2005-06

2014-15

  • Weekly Influenza and Respiratory Illness Activity Report: Summary 2014-15 (PDF)
    MDH uses several systems during influenza season to estimate the level of influenza activity among Minnesotans. Data reported in this slide set include cases from October 2014 through May 2015. Data were obtained from the following sources:
    • Case reporting of patients hospitalized with laboratory-confirmed influenza
    • Investigation of pediatric deaths related to influenza identified through hospital surveillance, Unexplained Deaths and Medical Examiner Infectious Deaths surveillance programs, and death certificate review.
    • Influenza and respiratory virus testing on a subset of patients from providers participating in the U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet)
    • School ILI outbreak reporting
    • Influenza in long-term care facility (LTCF) surveillance
    • MN Lab System (MLS) Laboratory Weekly Influenza Surveillance Program [over 100 clinic-and hospital-based laboratories submit data on rapid test results for Influenza and Respiratory Syncytial Virus (RSV), eight of these laboratories also report confirmatory culture testing]
    • Tracking of doctor's office visits for influenza-like illness (ILI) providers participating in ILINet

2013-14

  • Weekly Influenza and Respiratory Illness Activity Report: Summary 2013-14 (PDF)
    MDH uses several systems during influenza season to estimate the level of influenza activity among Minnesotans. Data reported in this slide set include cases from October 2013 through May 2014. Data were obtained from the following sources:
    • Case reporting of patients hospitalized with laboratory-confirmed influenza
    • Investigation of pediatric deaths related to influenza identified through hospital surveillance, Unexplained Deaths and Medical Examiner Infectious Deaths surveillance programs, and death certificate review.
    • Influenza and respiratory virus testing on a subset of patients from providers participating in the U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet)
    • School ILI outbreak reporting
    • Influenza in long-term care facility (LTCF) surveillance
    • MN Lab System (MLS) Laboratory Weekly Influenza Surveillance Program [over 100 clinic-and hospital-based laboratories submit data on rapid test results for Influenza and Respiratory Syncytial Virus (RSV), eight of these laboratories also report confirmatory culture testing]
    • Tracking of doctor's office visits for influenza-like illness (ILI) providers participating in ILINet

2012-13

  • Weekly Influenza and Respiratory Activity: Statistics Summary 2012-13 (PDF)
    MDH uses several systems during influenza season to estimate the level of influenza activity among Minnesotans. Data reported in this slide set include cases and deaths from October 2012 through May 2013. Data were obtained from the following sources:
    • Case reporting of patients hospitalized with laboratory-confirmed influenza
    • Investigation of deaths related to influenza identified through hospital surveillance, Unexplained Deaths and Medical Examiner Infectious Deaths surveillance programs, death certificate review, and nursing home outbreaks.
    • Influenza and respiratory virus testing on a subset of patients from providers participating in the U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet)
    • School ILI outbreak reporting
    • Influenza in long-term care facility (LTCF) surveillance
    • MN Lab System (MLS) Laboratory Weekly Influenza Surveillance Program [over 100 clinic-and hospital-based laboratories submit data on rapid test results for Influenza and Respiratory Syncytial Virus (RSV), eight of these laboratories also report confirmatory culture testing]
    • Tracking of doctor's office visits for influenza-like illness (ILI) providers participating in ILINet

2011-12

  • Weekly Influenza and Respiratory Activity: Statistics Summary 2011-12 (PDF)
    MDH uses several systems during influenza season to estimate the level of influenza activity among Minnesotans. Data reported in this slide set include cases and deaths from October 2011 through May 2012. Data were obtained from the following sources:
    • Case reporting of patients hospitalized with laboratory-confirmed influenza
    • Investigation of deaths related to influenza identified through hospital surveillance, Unexplained Deaths and Medical Examiner Infectious Deaths surveillance programs, death certificate review, and nursing home outbreaks.
    • Influenza and respiratory virus testing on a subset of patients from providers participating in the U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet)
    • School ILI outbreak reporting
    • Influenza in long-term care facility (LTCF) surveillance
    • MN Lab System (MLS) Laboratory Weekly Influenza Surveillance Program [over 100 clinic-and hospital-based laboratories submit data on rapid test results for Influenza and Respiratory Syncytial Virus (RSV), eight of these laboratories also report confirmatory culture testing]
    • Tracking of doctor's office visits for influenza-like illness (ILI) providers participating in ILINet

2010-11

  • Weekly Influenza Activity: Statistics Summary 2010-11 (PDF)
    MDH uses several systems during influenza season to estimate the level of influenza activity among Minnesotans. Data reported in this slide set include cases and deaths from October 2010 through May 2011. Data were obtained from the following sources:
    • Case reporting of patients hospitalized with laboratory-confirmed influenza
    • Investigation of deaths related to influenza identified through hospital surveillance, Unexplained Deaths and Medical Examiner Infectious Deaths surveillance programs, death certificate review, and nursing home outbreaks.
    • Influenza and respiratory virus testing on a subset of patients from providers participating in the U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet)
    • School ILI outbreak reporting
    • Influenza in long-term care facility (LTCF) surveillance
    • MN Lab System (MLS) Laboratory Weekly Influenza Surveillance Program [over 100 clinic-and hospital-based laboratories submit data on rapid test results for Influenza and Respiratory Syncytial Virus (RSV), eight of these laboratories also report confirmatory culture testing]
    • Tracking of doctor's office visits for influenza-like illness (ILI) providers participating in ILINet

2009-10

  • 2009 H1N1 Influenza in Minnesota Epidemiology (PDF) (PPT)
    MDH uses several systems during influenza season to estimate the level of influenza activity among Minnesotans. At the end of the 2008-2009 influenza season (April 2009) some surveillance activities were continued, and in several cases, expanded in order to track 2009 H1N1 influenza through April 2010. 
    Data reported in this slide set include cases and deaths from April 2009 through April 2010. Data were obtained from the following sources:
    • Case reporting of patients hospitalized with laboratory-confirmed influenza
    • Tracking of doctor's office visits for influenza-like illness (ILI) by 28 Influenza Sentinel Surveillance Program sites
    • School ILI outbreak reporting
    • MN Lab System (MLS) Laboratory Influenza Surveillance Program (over 100 clinic-and hospital-based laboratories submit data on rapid test results for Influenza and Respiratory Syncytial Virus (RSV), eight of these laboratories also report confirmatory culture testing)
    • Investigation of deaths related to influenza through the Unexplained Deaths and Medical Examiner Infectious Deaths Surveillance Programs

2008-09

2007-08

2006-07

2005-06

  • Long-Term Care Facility Outbreaks in Minnesota by Season (PDF)
  • Influenza Outbreaks in Minnesota Schools by Season (PDF)
  • MDH lab totals: 309 samples tested
    • 51% A - California-like (H3): 159 have been characterized as A/California/07/2004-like, an H3 strain that is well matched to this season's vaccine
    • 36% B - Hong Kong-like: 111 have been characterized as B/Hong Kong-like
    • 9% influenza A: 26 have been identified just as influenza A
    • 1% A (H1): 7 have been characterized as an H1 strain
  • Vaccine: A/New Caledonia/20/99 (H1N1)-like virus; A/California/7/2003 (H3N2)-like virus; and B/Shanghai/361/2002-like virus.

Updated Monday, August 10, 2015 at 09:46AM