Template:2009 US swine flu outbreak table
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Case Reporting in the United States
- Confirmed: a person with an acute febrile respiratory illness with laboratory confirmed S-OIV infection by one or more of the following tests:
- real-time RT-PCR
- viral culture
- Probable: a person with an acute febrile respiratory illness who is positive for influenza A, but negative for H1 and H3 by influenza RT-PCR
- Suspected: a person with acute febrile respiratory illness with onset
- within 7 days of close contact with a person who is a confirmed case of S-OIV infection, or
- within 7 days of travel to community either within the United States or internationally where there are one or more confirmed cases of S-OIV infection, or
- resides in a community where there are one or more confirmed cases of S-OIV infection.
The CDC releases a daily update on confirmed cases by state at 11:00 am ET. Many state departments of health release updates on confirmed and probable cases throughout the day. Several states have developed dedicated websites for information on the flu outbreak. Others release numbers on their department of health website or though daily press reports.
All U.S. States and Puerto Rico have received testing kits and training from the CDC that permits them to do local confirmation of samples. Previously all samples had to be sent to CDC headquarters in Atlanta, causing considerable delay in reporting.
The numbers from state authorities are often out of synch with those in the CDC daily report, primarily because the CDC updates its figures less frequently. For instance, the Illinois Department of Public Health updated the number of confirmed cases in Illinois to 225 at 10 a.m. CT on May 6, 2009, while the CDC update at 11:00 AM ET that day showed only 122 confirmed cases in Illinois. The CDC report also currently lists one trans-state case. A Kentucky woman who had returned home from Mexico later traveled to Georgia where she was diagnosed and treated for swine flu. Both Georgia and Kentucky record the case on their websites; the CDC notes the case for Kentucky.
Some states, including Michigan, Massachusetts, Tennessee, have stopped reporting probable numbers since receiving their CDC testing kits.
On May 14th the CDC changed its daily report from only confirmed cases to 'Confirmed and Probable cases'.
In early June the CDC changed from daily reporting to weekly reporting. The CDC report is published each Friday at 11:00 based on numbers reported by 3pm the previous day.
Changes of Fundamental Reporting Principles
Several states have abandoned the counting of confirmed cases. In the second half of June Michigan has moved to 'aggregate flu reporting', where no difference is made between novel (pandemic) flu and seasonal flu. This step is justified by the finding, that at this point of the year more than 98% of detected flu cases are caused by the novel flu. Other states, such as Utah (early June) and Washington (end of May), have started to report the number of hospitalized cases instead of infected cases. This new approach surely excludes many sources of error, but it hampers comparisons between states and over time.
The CDC discontinued reporting of individual confirmed and probable cases of novel H1N1 infection on July 24, 2009. The CDC will report the total number of hospitalizations and deaths weekly, and continue to use its traditional surveillance systems to track the progress of the novel H1N1 flu outbreak. 
- "Interim Guidance on Case Definitions to be Used For Investigations of Swine-Origin Influenza A (H1N1) Cases*". Centers for Disease Control and Prevention. 2009-04-30. Archived from the original on 2009-05-02. Retrieved 2009-05-01.
- "H1N1 Flu" (ARCHIVED VERSION OF DYNAMIC WEB PAGE). Alabama Department of Public Health. 2009-10-21. Reporting of aggregate statistics ended between 21 and 28 October, 2009 were "impractical because of the large number of people infected." (quote from this page version)
- "Novel H1N1 Influenza (Swine Flu)" (ARCHIVED VERSION OF DYNAMIC WEBPAGE). Alaska Department of Health and Social Services. 2009-09-17.
updated September 2, 2009 at 12:00 PM
- "Alaska Positive Rapid Tests For Influenza". Epidemiology. Alaska Department of Health and Social Services. Archived from the original on 2010-06-09. Retrieved 2014-03-02.
...(n=1,103)...from September 1, 2009 through April 6, 2010
- Armstrong, Michael (2010-02-15). "Homer woman who died at 44 tested positive for swine flu: Swine flu (H1N1)". Anchorage Daily News. Associated Press. Archived from the original on 2013-06-02. Retrieved 2014-03-02.
- "Alaska Laboratory-Confirmed Influenza Deaths by Week". Epidemiology. Alaska Department of Health and Social Services. Archived from the original on 2010-06-09. Retrieved 2014-03-02.
- "Arizona - Weekly Influenze Summary: MMWR Week 25-26 (6/20/10 - 7/03/10)" (PDF). Arizona Department of Health Services. 2010. p. 4. Archived from the original (PDF) on 2010-10-02.
- "H1N1 Flu (Swine Flu) Resources". Arkansas Department of Health. 2009-07-29.[dead link]
- http://arkansasmatters.com/content/news/fulltext?cid=302082[dead link]
- "Novel Influenza A (H1N1) Virus (Swine Flu) - Latest News". California - Department of Public Health. 2007-08-25. Retrieved 2009-08-27.
- "Influenza-Associated Hospitalizations by County by Diagnosis Date" (PDF). Colorado - Department of Public Health and Environment. 2009-08-30. Retrieved 2009-11-09.
- "CTFLUWATCH" (CONTINUOUSLY UPDATED WEBPAGE). Connecticut Department of Public Health. 2010-10-19.
Pandemic (H1N1) 2009 influenza A information for July 20, 2010
- "PAHO Influenza A(H1N1) Surveillance". PAHO. 2009-08-26. Retrieved 2009-08-26.
- No longer updating "H1N1 UPDATE - JUNE 18". Delaware - Department of Health and Social Services. 2009-06-18. Retrieved 2009-06-19.
- 7th death in DE from H1N1 influenza - WGMD.COM
- Drug-resistant swine flu reported in Va., Md
- Update each Wednesday "Swine Flu Information". Florida - Department of Health. 2009-07-21. Retrieved 2009-07-30.
- H1N1 Media Releases
- "H1N1". Georgia - Division of Public Health. 2009-09-24. Retrieved 2009-09-24.
- georgia.gov - Seasonal Flu
- "Influenza Surveillance Report" (PDF). July 19–August 1, 2009. HAWAI‘I STATE DEPARTMENT OF HEALTH DISEASE OUTBREAK CONTROL DIVISION. 2009-08-06. Retrieved 2009-08-26.
- Delawareonline - Levi Johnston wants to be mayor; has no platform
- "Idaho Case Counts". 2009 H1N1 Flu Surveillance Data. Idaho Department of Health & Welfare. Archived from the original on 2012-04-22.
- "Statistics" (ARCHIVED VERSION OF DYNAMIC WEB PAGE). H1N1 flu. Illinois Department of Public Health. 2009-08-12. Retrieved 2014-03-02.
Illinois Cases of H1N1 Flu by County (As of July 31, 2009, 10 a.m.)
- "Statistics" (ARCHIVED VERSION OF DYNAMIC WEB PAGE). H1N1 flu. Illinois Department of Public Health. 2010-05-08. Retrieved 2014-03-02.
Confirmed H1N1 2009 Hospitalizations and Deaths (As of May 7, 2010, 10 a.m.)
- "ISDH Press releases". Indiana - State Department of Health. 2009-08-20. Retrieved 2009-08-27.
- "Influenza and Other Respiratory Virus Weekly Activity Report" (PDF). Iowa - Department of Public Health. 2009-08-01. Retrieved 2009-08-26.
- newtondailynews.com | H1N1 vaccine plentiful in Iowa
- Iowa Influenza Surveillance Network (IISN) Reports
- update at Monday"Kansas H1N1 Flu Virus Information". Kansas - Department of Health and Environment. 2009-08-24.
- Kansan dies from H1N1 - Pratt, KS - Pratt Tribune
- "Flu Activity". Commonwealth of Kentucky. 2009-10-29.
- "DHH Updates Status of Fight the Flu Campaign". Louisiana - Department of Health & Hospitals. 2009-11-09. Retrieved 2009-11-09.
- Department of Health & Hospitals | State of Louisiana
- update weekly "Maine - H1N1 Influenza (“Swine Flu”) Update". Maine - Center for Disease Control and Prevention. 2009-08-26. Retrieved 2009-08-27.
- Flu News - CDC; DHHS Maine
- "Maryland weekly flu report". The Baltimore Sun. 2009-07-02. Retrieved 2009-07-02.
- Maryland Flu Watch
- Department of Health and Mental Hygiene Seasonal Influenza Preparedness Guide
- "Confirmed H1N1 Influenza (swine flu)". Massachusetts - Department of Public Health. 2009-08-27.
- Weekly Flu Report: April 15, 2010 - Commonwealth Conversations: Public Health
- Daily Update of fatalities "MDCH-Influenza A (H1N1)". Michigan - Department of Community Health. 2009-06-13. Retrieved 2009-07-30.
- [dead link]
- "Weekly Influenza Activity: Statistics". Minnesota - Department of Health. 2009-08-17.
- Weekly Influenza Activity - Minnesota Dept. of Health
- "Mississippi H1N1 Swine Flu Cases by County, 2009". Mississippi - State Department of Health. 2009-09-23.
- "Special Weekly Influenza Surveillance 2009-2010 Pre-Season Report, Missouri" (PDF). Missouri - Department of Health and Senior Services. 2009-08-22. Retrieved 2009-08-27.
- "Confirmed Novel Influenza A/H1N1 (Swine Flu)". Billings Gazette. 2009-08-06. Retrieved 2009-08-06.
- Flathead County man dies of swine flu; 19th such death in Montana
- "Influenza Report" (PDF). Week 34 (August, 29). Nebraska - Department of Health & Human Services. 2009-08-21. Retrieved 2009-08-27.
- AP Health News Online Breaking News & Headlines from Associated Press - pennlive.com
- "Nevada State Health Division Weekly Influenza Report". Nevada - State Health Division. 2009-08-21.
- Woman, 29, first H1N1 death in new year - Wednesday, Jan. 6, 2010 | 1:31 p.m. - Las Vegas Sun
- Boy, 10, dies from swine flu - News - ReviewJournal.com
- "WEEKLY INFLUENZA SURVEILLANCE REPORT" (PDF). New Hampshire - Department of Health & Human Services. 2009-08-29. Retrieved 2009-09-16.
- NH reports 10th H1N1-related death » New Hampshire » EagleTribune.com, North Andover, MA
- "New Jersey Department of Health and Senior Services UCommunicable Disease Service Influenza Brief" (PDF). Week Ending August 29, 2009 (MMWR Week 34). Retrieved 2009-09-23.
- "H1N1 Flu Hospitalizations and Deaths in NJ". New Jersey DHSS. 2009-08-26. Retrieved 2009-08-27.
- Two New H1N1-Related Deaths Reported | njtoday.net – Everything New Jersey
- Flu in New Mexico - Influenza Information
- New Mexico Analyzes Swine Flu | KDBC.com
- NM Department of Health Seasonal & H1N1Flu Information
- "H1N1 Flu (Swine Flu)". New York State - Department of Health. 2009-06-19. Retrieved 2009-06-19.
- "Health Alert #27" (PDF). New York City DHMH. 2009-07-08. Retrieved 2009-09-02.
- Update each Wednesday "NCPH: Influenza in N.C.". North Carolina - Public Health. 2009-07-29. Retrieved 2009-07-30.
- North Carolina Influenza Sentinel Surveillance Program
- ND Flu
- Few flu cases reported this year
- "Swine flu" (PDF). Ohio - Department of Health. 2009-07-30. Retrieved 2009-07-30.
- Daily Standard Stories
- updated on Mondays and Thursdays "Novel Influenza A H1N1 (Swine Flu) Daily Updates & Alerts". Oklahoma - State Department of Health. 2009-07-29.
- Swine flu death is 44th in Oklahoma | Tulsa World
- Update each Friday "H1N1 Influenza Update". Oregon - Department of Human Services. 2009-07-24. Retrieved 2009-07-30.
- H1N1 in PA › PA Situation Update
- "Rhode Island Department of Health Swine Flu". Rhode Island - Department of Health. 2009-07-30. Retrieved 2009-06-17.
- Third swine flu death reported in RI | Turn to 10
- RI sees 10th H1N1 death; vaccine to be offered broadly - Projo 7 to 7 News Blog | Rhode Island news | The Providence Journal
- "South Carolina Influenza Activity and Surveillance: 2008-2009 Season" (PDF). South Carolina - Department of Health and Environmental Control. 2009-06-13. Retrieved 2009-06-19.
- "South Dakota (A)H1N1 Surveillance". South Dakota - Department of Health. 2009-05-28. Retrieved 2009-06-05.
- "Sentinel Provider Influenza-Like Illness (ILI) Surveillance Summary" (PDF). Tennessee - Department of Health. 2009-11-21. Retrieved 2009-11-27.
- Update each Wednesday "Surveillance". Texas - Department of State Health Services. Retrieved 2009-10-24.
- Texas Department of State Health Services, Infectious Disease Control Unit > Surveillance
- "Utah Pandemic A (H1N1) 2009 Hospitalized Case Surveillance". Utah - Department of Health. 2009-07-29. Retrieved 2009-07-31.
- "Novel H1N1 Flu (Swine Flu): Status Update". Vermont - Department of Health. 2009-06-24. Retrieved 2009-06-26.
- Vt. Reports Third Swine Flu Death - WCAX.COM Local Vermont News, Weather and Sports
- "Confirmed Influenza A (H1N1) Case Counts". Virginia - Department of Health. 2009-07-10. Retrieved 2009-07-11.
- "Swine flu (H1N1) monitoring changes in Washington". WSDOH. 2009-05-26. Retrieved 2009-06-25.
- "Swine Flu Information". Washington - Department of Health and Human Resources. 2009-10-16. Retrieved 2009-10-20.
- Updated each Wednesday "Influenza Surveillance Data 2008-2009". West Virginia - Department of Health and Human Resources. 2009-06-18. Retrieved 2009-06-18.
- The Record Delta Woman with H1N1 dies
- Archived Influenza Season Data 2009-10
- "Current H1N1 Situation in Wisconsin". Wisconsin - Department of Health Services. 2009-07-29. Retrieved 2009-07-29.
- "Swine Influenza (Swine Flu)". Wyoming - Department of Health. 2009-08-05.
- More deaths as flu season continues in Wyoming
- pandemic influenza A/H1N1 2009 surveillance
- American Samoa News - Topix
- pandemic influenza A/H1N1 2009 suveillance report as of 27 October 2009
- Saipan Tribune
- Saipan Tribune
- :::** Diario La Verdad **:::
- Noticias de Prensa Latina
- AP National News Online Breaking News & Headlines from Associated Press - oregonlive.com
- See CDC interim definitions above
- "Illinois Department of Public Health Swine Flu Statistics". Illinois Department of Public Health. 2009-05-06. Retrieved 2009-05-06.
- "H1N1 Flu (Swine Flu)". H1N1 Flu. Centers for Disease Control and Prevention. 2009-05-06. Retrieved 2009-05-06.
- "Latest number of confirmed and probable ILI cases" (PDF). MCDH. 2009-06-23. Retrieved 2009-06-25.
- "FluView Influenza Season Week 23 ending June 13, 2009". Retrieved 2009-06-25.
- CDC H1N1 Flu | Situation Update
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