Flu News

April 4, 2019

Influenza Season Continues with an Increase in Influenza A(H3N2) Activity

The Centers for Disease Control and Prevention (CDC) is issuing this health advisory to notify clinicians that influenza activity remains high in the United States, with an increasing proportion of activity due to influenza A(H3N2) viruses, continued circulation of influenza A(H1N1) viruses, and low levels of influenza B viruses. Influenza should be considered as a possible diagnosis for patients with respiratory illness while local influenza activity remains elevated. Because influenza A(H3N2) viruses may be associated with severe disease in older adults, this health advisory serves as a reminder that early empiric treatment with influenza antiviral medications is recommended for hospitalized and high-risk patients, especially those 65 years and older. Antiviral treatment should be started as soon as possible after illness onset and should not wait for laboratory confirmation.

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February 15, 2019

Update: Influenza Activity – United States

CDC collects, compiles, and analyzes data on influenza activity and viruses in the United States. During September 30, 2018–February 2, 2019, influenza activity in the United States was low during October and November, increased in late December, and remained elevated through early February.

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January 15, 2019

Preliminary In-Season U.S. Influenza Burden Estimates

For the first time, the CDC is reporting in-season burden estimates of the flu in the United States.

Check it out here


December 17, 2018

Early-Season Update on 2018-2019 Influenza Activity and Vaccination Coverage

    • MMWR on early-season influenza activity in the United States from September 30- December 1, 2018 has been published
    • Influenza activity in the United States was low during October 2018, and, although it increased slowly during November, activity remained low across most of the country.
    • CDC expects influenza activity to increase in the coming weeks.
    • CDC recommends all persons aged ≥6 months, who do not have contraindications and who have not been vaccinated yet this season, get a seasonal flu vaccine now.
    • Early reports indicate overall flu vaccination coverage is up as of mid-November 2018 over the same time last season.
    • CDC estimates flu vaccination coverage among children aged 6 months–17 years was 45.6%, an increase of 6.8 percentage points compared with the same time during the 2017-18 flu season.
  • Flu vaccination coverage among adults aged ≥18 years reached 44.9%, an increase of 6.4 percentage points compared to last season.
  • For more information on the 2018-2019 flu season, please visit https://www.cdc.gov/flu/about/season/current.htm.

September 14, 2018

August 17, 2018

  • CDC is reporting an additional 4 human infections with influenza A(H1N2) viruses that normally circulate in swine and not people.  None were hospitalized, and all are recovering, or have fully recovered.
  • Sporadic human infections with swine influenza viruses do occur, most often in the context of exposure to pigs at agricultural fairs. All 4 patients reported exposure to pigs at agriculture fairs in either California, Michigan or Ohio.
  • No person-to-person spread of these viruses has been detected and the risk to the public from these infections is considered low, however CDC does have guidance for people attending fairs or other venues where swine will be present.
  • Visit cdc.gov/flu/swineflu/variant for more information.