What is the focus of tertiary disease prevention?

The focus of tertiary disease prevention is managing and reducing the impact of ongoing illness. This level of prevention is concerned with individuals who are already diagnosed with a disease or health condition. The goal is to help patients manage their conditions effectively, prevent any complications, and improve their quality of life. This can involve rehabilitation efforts, support systems, and ongoing medical care to ensure that individuals can maintain as much function and independence as possible despite their health challenges.

In contrast, the other options address different aspects of disease prevention. Preventing disease before it occurs pertains to primary prevention, which aims to reduce the risk factors that lead to disease. Early detection and treatment relate to secondary prevention, focusing on finding and addressing diseases as early as possible. Assessment of health trends, while important for public health, does not directly fall under the category of disease prevention focused on individual patient care and management.