Data Sources
Learn where Medova's travel health data comes from — WHO, CDC, ECDC, national health authorities, and more.
Updated 4/16/2026v1Machine translated
Data Sources
Medova aggregates travel health intelligence from authoritative global and national sources. Our data pipeline runs daily to ensure up-to-date information.
Primary Sources
World Health Organization (WHO)
- Global Health Observatory (GHO) — immunization coverage, disease incidence, health indicators for 194 member states
- Disease Outbreak News (DONs) — real-time outbreak alerts and situation reports
- IHR Event Information — International Health Regulations notifications
- Country Cooperation Strategies — national health system profiles
Centers for Disease Control and Prevention (CDC)
- Travelers' Health Notices — destination-specific travel health alerts (Watch / Alert / Warning)
- Yellow Book — comprehensive travel medicine reference, updated biennially
- Vaccine Information Statements — standardized vaccine safety and efficacy data
European Centre for Disease Prevention and Control (ECDC)
- Surveillance Atlas — EU/EEA infectious disease surveillance data
- Rapid Risk Assessments — emerging threat evaluations
- Vaccine Scheduler — European vaccination schedules by country
Classification Systems
| System | Source | Usage |
|---|---|---|
| ICD-11 | WHO | Disease classification codes |
| ATC | WHO Collaborating Centre | Vaccine/drug classification |
| ISO 3166 | ISO | Country and subdivision codes |
| IATA/ICAO | IATA/ICAO | Airport codes for travel routing |
Data Pipeline
Our automated pipeline processes data through these stages:
- Ingestion — Edge Functions fetch from source APIs on daily schedules via pg_cron
- Validation — Schema validation, deduplication, and anomaly detection
- Enrichment — Cross-referencing between sources, geocoding, translations
- Scoring — Health score computation using XGBoost risk models
- Publication — Data available via API and UI within minutes of processing
Freshness
| Data Type | Update Frequency | Source |
|---|---|---|
| Vaccination requirements | Daily | WHO, CDC, national authorities |
| Disease outbreaks | Real-time | WHO DONs, CDC notices |
| Travel advisories | Every 6 hours | Government foreign affairs ministries |
| Climate data | Weekly | Open-Meteo, historical averages |
| Clinic directory | On submission + monthly verification | Clinic partners, Google Maps |
| Health scores | Daily recalculation | Composite (all sources) |
Methodology
For details on how we compute health scores from raw data, see the Health Score Algorithm documentation.
Data Quality
We track data quality metrics including:
- Coverage — percentage of countries with complete data per indicator
- Freshness — median age of data points by category
- Accuracy — cross-validation between independent sources
- Completeness — percentage of fields populated per entity
Quarterly data quality reports are available to Enterprise customers.