As of Nov. 25, influenza activity in the United States has been low and lower than the same period last year. However, influenza activity is expected to increase in the next few weeks or months. During 14 of the last 18 years, the flu season peaked in January or later. The flu season runs through April. The flu shot offers protection 10 to 14 days after vaccination.
Influenza vaccination is the best way to prevent influenza.
Influenza vaccine is now more widely available and will continue to be available in December and January. The total influenza vaccine supply for this flu season will be similar to the supply used last year. Check with your health care provider about vaccine supply. People at high risk for complications from influenza illness, their household contacts and health care workers who have not yet been vaccinated should make every effort to obtain vaccine and continue to be vaccinated during December and beyond. Anyone 65 years of age or older, residents of nursing homes, adults and children 6 months of age or older with diabetes, immune system problems, or chronic lung disease are considered high risk for complications and should be vaccinated to protect against the flu.