Which of the following is NOT listed among the successes in epidemiology and public health?

• A. Cholera
• B. Legionnaire's Disease
• C. Malaria
• D. Smallpox

Answer: (C)

Public health successes are usually those that have eradicated or greatly reduced a disease burden through vaccination, sanitation, surveillance, and effective outbreak control. Smallpox is a landmark example because it was globally eradicated through vaccination campaigns. Cholera has seen major reductions in mortality and outbreaks in many regions thanks to clean water, sanitation, and proper case management. Legionnaires’ disease illustrates how epidemiologic investigation and improvements in water system management prevent outbreaks. Malaria, while there have been meaningful gains in control in various places, has not been eradicated or eliminated globally and remains a major ongoing burden, so it is not counted among the notable global public health successes in the same way.