Preventing Influenza (Flu)
Flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes the lungs. It can cause mild to severe illness and at times can lead to death. The best way to prevent flu is by getting a flu vaccine each year.
Everyone 6 months of age and older should get a flu vaccine every season. Flu vaccines are particularly important for people who are at high risk of serious complications from influenza.
Information for specific groups
School & Childcare Providers
Businesses & Employers
Parents & Guardians
Individuals at High Risk
Seasonal influenza viruses are detected year-around but are most common during the fall and winter. Although the timing and duration can vary, flu activity begins to increase in October, peaks between December and February, and can last as late as May.