Final answer:
Influenza is not a leading cause of death in patients older than 65 years of age.
Step-by-step explanation:
The correct answer is Influenza.
Heart disease, cancer, and stroke are all leading causes of death in patients older than 65 years of age. However, influenza, or the flu, is not considered a leading cause of death in this age group.
It's important for older adults to protect themselves against the flu by getting vaccinated annually, as they are at higher risk for complications.