National Influenza Vaccination Week (NIVW) is an annual, week long observance to remind Americans that it’s not too late to get a flu shot. The observance was established in 2005 by the Centers for Disease Control in response to information that influenza vaccination declines after November. CDC recommends that everyone six months of age and older receive an annual flu shot. Influenza immunization is recommended by the end of October, before the flu is circulating widely. It takes two weeks after receiving the flu shot to develop immunity to the flu strains contained in the vaccine, so it’s best to get vaccinated early. However, CDC encourages flu vaccination efforts throughout the flu season. Flu caused approximately 80,000 deaths during the 2017-2018 season. Of the 185 pediatric flu deaths in the 2017-2018 season, 80% were unvaccinated children.