Which of the following correctly outlines the steps in vaccine-preventable disease surveillance and the definition of disease control, elimination, and eradication?

The correct steps to conduct vaccine-preventable disease surveillance typically begin with case detection, followed by investigation, sample collection, classification, data analysis, and reporting. Options A and B both accurately describe this sequence. Option C starts with "Case investigation," which usually follows "Case detection." Therefore, C is not the most accurate initial step. Since C is not fully correct, "All of the above" cannot be the answer.

The correct option is A.

• A. Case detection, case investigation, sample collection, case classification, data analysis and reporting

The definition provided, "reduction of disease incidence, prevalence, morbidity, or mortality to a level that is locally acceptable as a result of deliberate efforts," corresponds to the definition of disease control.

• Control aims to reduce the burden of a disease to a manageable level.
• Elimination aims to reduce the incidence of a disease to zero in a specific geographical area.
• Eradication aims for the permanent reduction to zero of the worldwide incidence of infection.

The correct option is A.

• A. Control

"Regular reporting of disease data by all institutions that see patients (or test