Nicaragua received vaccines in the early days of PIVI’s formation through initial collaboration between the Centers for Disease Control and Prevention (CDC), the Pan American Health Organization (PAHO), and Walgreens in 2013. The Ministry of Health’s national flu vaccination program initially focused on inoculating pregnant women. PIVI and Nicaragua’s Ministry of Health achieved very high coverage, and more than 52,000 pregnant women have been protected against seasonal influenza since 2013.