Source: National Center for Immunization and Respiratory Diseases (NCIRD) — Content from the Centers for Disease Control and Prevention (public domain).
Purpose National Influenza Vaccination Week (NIVW) is a national awareness week focused on highlighting the importance of influenza vaccination. From December 1-5, 2025, we will observe National Influenza Vaccination Week, a reminder for everyone 6 months and older that there’s still time to get a flu vaccine this season. 
About National Influenza Vaccination Week National Influenza Vaccination Week (NIVW) is an annual observance in December to remind everyone 6 months and older that there’s still time to get vaccinated against flu. Vaccination is particularly important for people who are at higher risk of developing serious flu complications, including pregnant women and young children. Millions of children get sick with flu every year, and thousands will be hospitalized as a result. During pregnancy, you also are at higher risk of developing serious flu complications. Since flu viruses are constantly changing and protection from vaccination decreases over time, getting a flu vaccine every year is the best way to reduce your risk from flu. A flu vaccine is the only vaccine that protects against flu and has been shown to reduce the risk of flu illness, hospitalization, and death. Talk to your doctor about flu vaccination. Together, we can use NIVW as a nationwide call to action to encourage everyone 6 months and older to get their annual flu vaccine, especially pregnant women, young children, and others at higher risk. The more people vaccinated against flu, the more people are protected from flu.