The flu, or influenza, is a contagious respiratory illness caused by influenza viruses.

Flu viruses spread mainly through droplets made when people with the flu cough, sneeze, or talk. Common symptoms of the flu include:

  • Fever or chills

  • Cough

  • Sore throat

  • Runny or stuffy nose

  • Body aches

  • Headaches

  • Fatigue

  • Occasionally, vomiting and diarrhea (more common in children)

Understanding influenza is vital for minimizing its impact on individual health.

Preventative measure options include getting the annual influenza vaccine, regular hand washing, and practicing good respiratory hygiene, such as covering coughs and sneezes.

Influenza Guide