While flu prevention measures are important for everyone, seniors in particular benefit from preventative measures as our immune systems naturally get weaker as we age. And while a preventative measure, such as the flu vaccine, can’t guarantee that an aging adult will 100% avoid catching the flu, it does lower the chances of catching the flu and helps to lessen the severity of the symptoms if a senior does experience the flu. And that’s especially helpful considering that an estimated 90% of flu-related deaths are people 65 years of age and older.