- Influenza is a major cause of morbidity and mortality among adults. The most effective strategy for preventing influenza is annual vaccination. However, vaccination coverage has been suboptimal among adult populations. The purpose of this study is to assess trends in influenza vaccination among adult populations.
- During annual influenza epidemics, rates of serious illness and death are higher among those who have medical conditions, such as pulmonary disease, diabetes, or heart disease, which place them at increased risk of influenza complications. Annual influenza vaccination was recommended for people with high-risk conditions as early as 1960.