Which data source is commonly used to track vaccination status in public health surveillance?

• A. Morbidity reports.
• B. Immunization records.
• C. Employer payroll data.
• D. School attendance records.

Answer: (B)

Tracking vaccination status relies on records built to capture every immunization a person receives. Immunization records document vaccine type, date, dose sequence, and patient identifiers, and they feed into immunization information systems or state registries that aggregate data across providers. This setup makes it possible to determine who is up to date with recommended vaccines, identify under-immunized groups, and measure coverage at local, state, and national levels to guide public health actions.

Morbidity reports focus on disease outcomes rather than vaccination history, so they don’t provide reliable data on who has been vaccinated. Employer payroll data tracks employment information, not health or vaccination details. School attendance records show whether a student is present at school but do not contain standardized vaccine history, so they aren’t used to monitor immunization status.