Population

A numerically calculated value derived from immunization data, used in quality measurement, risk stratification, or public health reporting to rank vaccination compliance, assess population immunity levels, or evaluate provider performance against established immunization benchmarks.

The numeric position of a specific vaccine dose within a multi-dose immunization series, such as dose 1, 2, or 3 of a hepatitis B or HPV series, recorded in immunization registries and EHR systems to track series completion and determine next scheduled dose timing.

The date on which a vaccination service was delivered to a patient by a healthcare provider, used in claims adjudication, immunization registry reporting, and quality measure calculations to confirm timely immunization and support coordination of care across providers and health systems.

A clinical classification indicating the seriousness level of an adverse event or reaction experienced following vaccine administration, ranging from mild local reactions to severe systemic events, documented to support pharmacovigilance reporting, VAERS submissions, and patient safety monitoring.

The biological sex classification of the patient receiving a vaccine, recorded in immunization records to support sex-specific dosing protocols, public health surveillance, equity analysis, and reporting of vaccination coverage rates across male and female population segments.

Identifies the origin system or reporting entity that submitted the immunization record, such as a clinic, pharmacy, school, or immunization registry. Used to determine data provenance and support deduplication across immunization information systems.

The calendar date on which a vaccination series or individual immunization dose was initiated. Used in immunization registries and clinical records to calculate series completion timelines, assess adherence to recommended schedules, and support population health reporting.

The clock time at which administration of a vaccine dose began. Recorded in clinical and immunization registry systems to support precise documentation, adverse event monitoring, and multi-dose timing protocols requiring interval tracking within a single encounter.

The U.S. state or territory where the vaccine was administered. Used in immunization registries and public health surveillance systems to attribute vaccination events to jurisdictions, support regional coverage reporting, and enable cross-state immunization record matching.

Indicates the current completion or validity state of a vaccination record, such as administered, refused, contraindicated, or historical. Used in immunization registries and clinical systems to determine patient eligibility for additional doses and assess population immunity coverage.

The physical street address of the location where the vaccine was administered. Captured in immunization registries and public health systems to support geographic analysis of vaccination coverage, outbreak response, and site-level reporting for administration tracking.

The concentration or potency of the vaccine formulation administered, expressed in standardized units such as mcg or IU per dose. Used in clinical and pharmacy records to confirm correct dosing, differentiate between formulations, and support adverse event investigation and pharmacovigilance.

A partial aggregated count or cost of vaccination records within a defined subset, such as by age group, vaccine type, or reporting period. Used in public health reporting and immunization program analytics to summarize intermediate breakdowns before final totals are calculated.

A unique system-generated key assigned to a vaccination record within a specific health information system or immunization registry. Used to precisely identify, retrieve, and link vaccine administration events across clinical, billing, and public health reporting platforms.

The intended disease or pathogen that a vaccine is designed to provide immunity against, such as influenza, hepatitis B, or HPV. Used in immunization registries and clinical systems to categorize vaccine events, track disease-specific coverage rates, and support public health program goals.

A standardized classification code, such as CVX or MVX, that identifies the vaccine type or manufacturer in immunization records. Used in clinical data exchanges, immunization registries, and public health systems to ensure consistent categorization and interoperability across reporting platforms.

The recorded storage or administration temperature of the vaccine at the time of handling or administration. Captured in cold chain management and clinical documentation systems to verify vaccine viability, ensure compliance with manufacturer storage requirements, and investigate potential cold chain breaks.

The date on which a vaccination series, contraindication, or exemption record was considered ended or expired. Used in immunization registries and clinical systems to manage series validity, close out exemption periods, and trigger reminders for follow-up doses or re-evaluation.

The specific time of day at which a vaccine dose was administered to the patient. Documented in immunization registries and clinical records to support precise administration timelines, adverse event reporting, and multi-dose interval calculations within structured immunization schedules.

A combined date and time value recording the exact moment a vaccine was administered or a vaccination record was created or modified. Used in immunization registries and clinical audit trails to establish precise event chronology, support adverse event tracking, and ensure data integrity.