Content on this page was developed during the 2009-2010 H1N1 pandemic and has not been updated.
- The H1N1 virus that caused that pandemic is now a regular human flu virus and continues to circulate seasonally worldwide.
- The English language content on this website is being archived for historic and reference purposes only.
- For current, updated information on seasonal flu, including information about H1N1, see the CDC Seasonal Flu website.
Facts and Figures about 2009 H1N1
June 17, 2010, 11:30 AM ET
- Questions and Answers: Average and Median Ages of 2009 H1N1-Related Deaths in the United States, Spring and Fall 2009
- Questions and Answers: Underlying Health Conditions Among Adults and Children Hospitalized with 2009 H1N1
- Questions and Answers: 2009 H1N1 impact by Race and Ethnicity
- Questions and Answers: Flu-Related Hospitalizations and Deaths in the United States from April 2009 – January 30, 2010
- CDC Estimates of 2009 H1N1 Influenza Cases, Hospitalizations and Deaths in the United States, April 2009
- In The News: Questions & answers highlighted in the news.
- 2009 H1N1 Early Outbreak and Disease Characteristics: A summary of key disease characteristics based on information gathered during the first weeks of the 2009 H1N1 outbreak.
- Questions and Answers: NEJM article "Hospitalized Patients with 2009 H1N1 Influenza in the United States- April-June 2009
- Questions and Answers: EID article "Estimates of the Prevalence of Pandemic (H1N1) 2009, United States, April-July 2009
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