Influenza Activity - Previous Years
Archive of influenza statistics.
On this page:
2011-2012
2010-2011
2009-2010
2008-2009
2007-2008
2006-2007
2005-2006
2004-2005
2003-2004
2011-2012
- Weekly Influenza and Respiratory Activity: Statistics Summary 2011-12 (PDF:662MB/8 pages)
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
2010-2011
- Weekly Influenza Activity: Statistics Summary 2010-11 (PDF:1.08MB/8 pages)
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
2009-2010
- 2009 H1N1 Influenza in Minnesota Epidemiology (PDF: 207KB/38 pages) (PPT: 767KB/38 slides)
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
2008-2009
- Long-Term Care Facility Outbreaks in Minnesota by Season (PDF: 18KB/1 page)
- Influenza Outbreaks in Minnesota Schools by Season (PDF: 18KB/1 page)
- MDH lab totals: 650 isolates
- 60%: 388 have been characterized as influenza A/H1 serotype
- 36%: 236 have been characterized as influenza B/Malaysia-like
- 2%: 13 have been characterized as Influenza A/H3 serotype
- 1%: 8 have been identified just as influenza A
- <1%: 4 have been characterized as influenza B/Florida-like
- <1%: 1 has been identified just as influenza
- Influenza and RSV Lab Testing Data
- Vaccine: The 2008-09 trivalent vaccine virus strains are A/Brisbane/59/2007 (H1N1)-like, A/Brisbane/10/2007 (H3N2)-like, and B/Florida/4/2006-like antigens.
2007-2008
- Long-Term Care Facility Outbreaks in Minnesota by Season (PDF: 16KB/1 page)
- Influenza Outbreaks in Minnesota Schools by Season (PDF: 16KB/1 page)
- MDH lab totals: 869 samples tested
- 48%: 420 have been identified as influenza B/Shanghai-like
- 30% : 261 have been identified just as influenza A
- 14%: 125 have been characterized as Influenza A/H3 serotype
- 6%: 55 have been characterized as Influenza A/H1 serotype
- <1%: 7 have been characterized as Influenza B/Maylasia-like
- <1%: 1 has been identified just as influenza B
- Influenza and RSV Lab Testing Data
- Vaccine: A/Solomon Islands/3/2006 (H1N1)-like virus, A/Wisconsin/67/2005 (H3N2)-like virus, B/Malaysia/2506/2004-like virus
2006-2007
- Long-Term Care Facility Outbreaks in Minnesota by Season (PDF: 16KB/1 page)
- Influenza Outbreaks in Minnesota Schools by Season (PDF: 16KB/1 page)
- MDH lab totals: 558 samples tested
- 84%: 471 have been characterized as Influenza A/H1 serotype
- 11% : 64 have been characterized Influenza A/H3 serotype
- 1%: 7 have been identified just as influenza A
- 3%: 16 have been identified just as influenza B
- Influenza and RSV Lab Testing Data
- Vaccine: A/New Caledonia/20/99 (H1N1)-like virus; A/Wisconsin/67/2005 (H3N2)-like virus; and B/Malaysia/2506/2004-like virus.
2005-2006
- Long-Term Care Facility Outbreaks in Minnesota by Season (PDF: 17KB/1 page)
- Influenza Outbreaks in Minnesota Schools by Season (PDF: 17KB/1 page)
- 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.
2004-2005
- Long-Term Care Facility Outbreaks in Minnesota by Season (PDF: 16KB/1 page)
- Influenza Outbreaks in Minnesota Schools by Season (PDF: 17KB/1 page)
- Percent ILI as Reported by MN Sentinel Providers (PDF: 17KB/1 page)
- MDH lab totals: 820 samples tested
- 65% A-Wyoming-like (H3): 538 isolates have been identified as A-Wyoming-like (H3), which is well matched to the influenza A/Fujian (H3N2)-like component in the 2004-2005 vaccine.
- 33% B-Sichuan-like: 273 isolates were identified as B-Sichuan-like, which is well matched to the B-Shanghai strain that is covered in the 2004-2005 influenza vaccine
- 1% Other : Nine isolates were identified as just as Influenza A, one was Influenza B, and two were B/Hong-Kong-like.
- Vaccine: A/New Caledonia/20/99 (H1N1); A/Wyoming/03/2003 (H3N2), and B/Shanghai/361/2002-like virus.
2003-2004
- 2003-2004 Totals (Excel: 45KB/3 sheets)
- MDH lab totals: 919 samples tested
- 99% A-Panama-like (H3): 911 isolates have been identified as A-Panama-like (H3), which is well matched to this year's vaccine.
- 1% Other : Five isolates were identified as Influenz A, one isolate was identified as A/New Caldonia-like H1, one as Influenza B, and one as B/Hong-Kong-like.
- Vaccine: A/New Caledonia/20/99 (H1N1); A/Panama/2007/99 (H3N2), and B/Hong Kong/330/2001-like virus.
Spotlight
Voluntary quality assurance program for community vaccinators.
Order Influenza Immunization Materials
Health care worker flu vaccination program.
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