The first week of December is National Influenza Vaccination Week. Influenza is a contagious virus that can come with serious complications particularly for those who have conditions such as diabetes, lung disease, and heart disease. It is estimated that 31% of individuals in the U.S. aged 50-64 and those 65 and older have at least one chronic condition that increases their risk of flu related complications. However, there are several things that you can do to keep yourself healthy during flu season. Here are 3 things that you need to know about the flu and chronic disease health.