Which of the following is an example of a chronic disease?

Diabetes mellitus is categorized as a chronic disease because it is a long-lasting condition that affects how the body processes blood sugar (glucose). It typically requires ongoing management and care, including lifestyle modifications, monitoring of blood glucose levels, and often medication. Unlike acute illnesses, which come on suddenly and are usually of short duration, chronic diseases like diabetes develop over time and can have lasting effects on a person's health.

Chronic diseases are characterized by their persistence and the requirement for long-term management, and diabetes mellitus fits this description well. In contrast, conditions such as influenza, the common cold, and acute bronchitis are acute diseases. These typically present with sharp but brief symptoms and often resolve entirely with appropriate treatment or time, meaning they do not require the same level of ongoing care and management as chronic diseases. Understanding the distinction between chronic and acute conditions is important for effective patient care and management.