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Influenza (vaccine-preventable)


Influenza,  commonly known as the flu, is a contagious respiratory tract infection caused by the influenza virus. Symptoms of influenza generally include fever, cough, sore throat, muscle aches, headache, or fatigue. Influenza can cause mild to severe illness, and at times can lead to death.
During most influenza seasons, typically from November to April, between 10 percent and 20 percent of the population is infected with influenza. More than 200,000 people are hospitalized with influenza each year in the U.S. Certain groups of people, including older adults, young children, pregnant women, and people with certain health conditions, are at higher risk for serious complications from influenza illness.
The best way to avoid getting and spreading the flu is by getting vaccinated each year. Get more information on influenza prevention, treatment, and find out where to get a flu shot at

Disease Reporting

  • Deaths in any Oregon resident under 18 years of age with laboratory-confirmed influenza

Portland Tri-County Area (Multnomah, Clackamas and Washington counties):

  • Hospitalized patients of any age with laboratory-confirmed influenza. The Oregon State Public Health Laboratory will perform free typing and subtyping by PCR on speciments from any hospitalized patient with influenza-like illness, even if rapid tests have been negative. To report an adult or pediatric influenza-associated hospitalization, severe influenza-associated illness in pregnant women (ICU admission or death) or pediatric death, please contact Magdalena K Scott at 971-673-1111 or by email  
    Hospital infection control staff may use the eSentinel reporting system.

See Influenza Testing Guidelines

To report Influenza-related hospitalizations, please use: Case report form (pdf) 

To report Influenza-related pediatric deaths, please contact Magdalena K Scott at (971) 673-1111, or e-mail



To see information on influenza surveillance programs and the latest reports on influenza in Oregon, visit Surveillance Data.

See Also