Influenza (the flu) is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death. Some people, such as older people, young children, and people with certain health conditions, are at high risk for serious flu complications. The best way to prevent the flu is by getting vaccinated each year.
In 2009-2010, a new and very different flu virus (called 2009 H1N1) spread worldwide causing the first flu pandemic in more than 40 years. During the 2010-2011 flu season, CDC expects the 2009 H1N1 virus to cause illness again along with other influenza viruses. The 2010-2011 flu vaccine will protect against 2009 H1N1 and two other influenza viruses.
A summary of key seasonal flu facts and who should get vaccinated…
Information about the 2010-2011 season…
Flu symptoms and how some people are at greater risk from severe complications…
Some people are more likely to get flu complications that result in being hospitalized and occasionally in death…
How the virus spreads and how long people may be contagious…
General information on regular flu seasons in the United States…
Information about flu and staph infections, MRSA…