What term describes the termination of disease transmission by extermination of the infectious agent, a global concept in which interventions are no longer needed?

• A. Eradication
• B. Elimination
• C. Extinction
• D. Containment

Answer: (A)

Eradication is the idea being tested. It means the disease transmission has been stopped worldwide and the infectious agent no longer circulates in humans, so no ongoing public health interventions are needed anywhere. This distinguishes it from elimination, which is zero transmission in a defined geographic area but may still require surveillance and measures elsewhere to prevent reemergence. Extinction would imply the pathogen no longer exists anywhere, a scenario not typically used to describe public health goals. Containment refers to limiting spread during an outbreak and does not imply zero transmission globally. Classic example: smallpox is considered eradicated because transmission has ended globally and vaccination can be stopped.