Early Bird Gets the Flu: What Should Be Done About Waning Intraseasonal Immunity Against Seasonal Influenza?

Recently published studies highlight the growing evidence for waning immunity within a single influenza season among vaccinated individuals. However, the public health efforts to increase vaccination coverage has resulted in earlier administration of vaccines. We find this approach to be suboptimal, as the benefits of early vaccination could be lost during peak months of influenza activity. Immunity generated by influenza vaccines is a complex scientific issue with many contributing factors. We advocate for a nuanced approach to the seasonal vaccine program- one that considers duration of immunity as much as it considers coverage. As we strive for higher rates of vaccination, we must also improve the efficacy of the vaccine and the public health programs that are responsible for distributing and administering the vaccine.