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This year marks 100 years since the 1918 influenza pandemic, the most severe pandemic in recent history
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 Influenza (Flu)
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Weekly U.S. Influenza Surveillance Report
CDC's Influenza Division produces a weekly influenza surveillance report, FluView. According to this week's report (March 18-24), seasonal influenza activity decreased in the United States. Four states still experienced high Influenza Like Illness (ILI) activity levels.
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1918 Flu Pandemic Commemoration
This year marks 100 years since the 1918 influenza pandemic, the most severe pandemic in recent history. CDC will commemorate the 1918 pandemic with a series of events, exhibits, and communication activities in remembrance of the pandemic and to mark the progress made in pandemic flu preparedness and response.
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Understanding Flu Viruses
There are two main types of influenza virus: Types A and B. The influenza A and B viruses that routinely spread in people (human influenza viruses) are responsible for seasonal flu epidemics each year. Over the course of a flu season, different types (A & B) and subtypes (influenza A) of influenza circulate and cause illness.
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#FluFact: Did you know flu viruses are named in part based on where and when they are originally collected? Learn more: https://go.usa.gov/xQr6K
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| Content source: National Center for Immunization and Respiratory Diseases |
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