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.
About 2009 H1N1 Flu
December 5, 2009, 6:00 AM ET
Many people may become sick with 2009 H1N1 flu
This flu season, many people may get sick with 2009 H1N1 flu, as well as with seasonal flu.
- The first cases of 2009 H1N1 flu were reported in the spring of 2009. Since the virus is new, most people are not immune to it. That means many more people may become sick than usual this flu season.
- The word “flu” is short for “influenza.” They mean the same thing.
5 steps to take if you get 2009 H1N1 or seasonal flu
- Stay at home and rest.
- Avoid close contact with well people in your house so you won’t make them sick.
- Drink plenty of water and other clear liquids to prevent fluid loss (dehydration).
- Treat fever and cough with medicines you can buy at the store.
- If you get very sick or are pregnant or have a medical condition that puts you at higher risk of flu complications (like asthma…), call your doctor. You might need antiviral medicine to treat flu.
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