Influenza Season Services
Influenza is commonly known as "the flu." Every year, there are a number of different influenza viruses circulating the world and causing flu-like symptoms in people who become infected.
Northwestern Medicine's Influenza Season Services is dedicated to prevent flu epidemics and complications by providing vaccinations, resources and information to patients and community members.
In a typical year, the seasonal flu affects between 5 and 20 percent of the population in the United States, and approximately 36,000 people die from complications of the flu. Most cases of the seasonal flu occur between late fall and early spring.
Influenza is caused by one of several strains of influenza viruses that infect the nose, throat and lungs, making life miserable for a week or two for many people—and deadly for some. Flu season can begin as early as October and peak anywhere from late December to early April.
Your best defense against the flu is to get vaccinated as soon as possible, when the flu vaccine becomes available in your community.
You can get vaccinated in 1 of 2 ways:
Find out more about the different types of influenza and how it spreads.
Read our influenza FAQ.
Flu Resources at Northwestern Medicine
Click here to find out more about what Northwestern Medicine is doing to prevent viruses and keep them from spreading.
If you think you may have the flu or you have been exposed to the flu, take our quizzes to determine whether you should seek medical help.
I think I may have the flu
I think I may have been exposed to the flu