CDC Flu Data
Report estimates flu illnesses and hospitalizations prevented by vaccination last season
How many people got their flu vaccination already? View estimates with FluVaxView!
CDC Influenza Application
for Clinicians and Health Care Professionals
Influenza Surveillance Data the Way You Want it!
04/15/2014 08:11 PM EDT
How CDC uses antigenic characterization as part of global flu surveillance and to select viruses for use in the seasonal flu vaccine.
04/16/2014 04:03 PM EDT
04/18/2014 12:00 PM EDT
04/18/2014 1:00 PM EDT
Flu activity is low in most of the United States, but a wave of influenza B virus activity is affecting parts of the country. It's possible that significant flu activity could continue into May. CDC still recommends that people get a flu vaccine if they have not yet this season. And remember that flu antiviral drugs are a second line of defense to treat flu illness. People at high risk of serious flu illness should call a health care provider if they get flu symptoms.
What You Should Know for the 2013-2014 Season
- When did flu activity peak?
- Who was most severely impacted by flu this season?
- Are new flu viruses circulating this season?
- How well is the vaccine working this season?
CDC antigenically characterizes about 2,000 influenza viruses every year to compare how similar currently circulating influenza viruses are to those that were included in the influenza vaccine, and to monitor for changes in circulating influenza viruses. Antigenic characterizationcan give an indication of the flu vaccine’s ability to produce an immune response against the influenza viruses circulating in people.