Google Flu Trends uses aggregated Google search data to estimate flu activity in any state up to two weeks faster than traditional systems. Click here to view map and trends for U.S., Arizona, and other states.
Influenza (the flu) is a serious contagious respiratory illness caused by influenza viruses. Millions of people in the United States get the flu each year. Most people are sick for about a week. Some people (especially young children, pregnant women, older people, and people with chronic health problems) can get very sick and may die from the flu. For more information, click here.