What is the flu?

  • Influenza (flu) is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. Some people, such as older people, young children, and people with certain health conditions, are at higher risk of serious flu complications.  There are two main types of influenza (flu) viruses: 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.
  • The best way to reduce the risk of flu and its potentially serious complications is by getting vaccinated each year. Find out more about the flu vaccine here.
  • Keep track of Chicago’s most recent data on flu through the Chicago Influenza and Respiratory Virus Surveillance Report.

Is this a reportable illness?

  • This is not a reportable illness to CDPH but consult with your school nurse to learn more.
    • Please note that medical providers who diagnose flu have specific reporting responsibilities.

What do schools need to do next?

  • Encourage annual influenza vaccine, as it is recommended for everyone 6 months and older.
  • Sick Person
    • Exclude student until fever-free for 24 hours without the use of fever reduction medications.
    • Criteria may differ in pandemic or novel/variant strain influenza situation.
  • No action for close contacts.
  • No special cleaning.