Which term describes diseases of great population health or public health importance that require reporting?

• A. Endemic diseases
• B. Zoonotic diseases
• C. Non-communicable diseases
• D. Reportable diseases

Answer: (D)

Public health surveillance hinges on diseases that must be reported because they carry significant implications for population health. These are called reportable diseases. The designation creates a legal obligation for clinicians and laboratories to notify health authorities when a case is diagnosed, so data can be collected quickly and systematically. This enables monitoring of trends, early detection of outbreaks, identification of clusters, and timely public health responses such as investigations, resource deployment, and control measures.

Endemic diseases describe regular, expected levels of disease in a population, which is about baseline presence rather than reporting requirements. Zoonotic diseases refer to those that can jump from animals to humans, focusing on transmission pathways rather than reporting rules. Non-communicable diseases are not infectious and generally aren’t subject to the same mandatory reporting framework. The key idea is the statutory requirement to report certain conditions to protect and manage public health.