Seasonal Flu
- Happens every year, usually in late fall and in winter. Can usually be prevented by a yearly vaccine.
- Caused by influenza viruses that circulate among people.
- Symptoms are fever, achiness, and runny nose. Some people become very ill and may die of complications such as pneumonia.
- Very young, elderly, pregnant, and those with underlying health conditions are most at risk of serious illness.
- Usually has little impact on society, but can cause people to feel miserable and be absent from school or work |
Avian (Bird) Flu
- Ongoing outbreak since 1997, affecting birds in Asia, Europe, and Africa. Has infected 218 people as of May 2006.
- Caused by a virus that is carried by wild birds but kills domestic birds such as chickens.
- Symptoms are similar to seasonal flu, but people become seriously ill. These people have pneumonia.
- Only people in close contact with sick birds have gotten sick. Over 50% of those diagnosed have died. It does not spread person-to-person.
- No birds in the United States have been found to have this virus. |
Pandemic Flu
- Occurs rarely (4 times during the last century), but can happen any time of year and can last up to two years. There is no Pandemic Flu virus right now.
- Will be caused by a brand new virus not seen in people before.
- Symptoms begin like seasonal flu, but it causes more people to be seriously ill and die.
- In addition to the elderly, young, pregnant, and those with underlying health conditions, healthy adults may be at risk for serious complications. |