Datasets:

EPI-Eval
/

ecdc-erviss

pretty_name: ECDC ERVISS — ILI/ARI primary-care consultation rates
license: other
size_categories:
  - 10K<n<100K
tags:
  - cadence-weekly
  - geo-eu
  - surveillance-respiratory
  - pathogen-influenza
  - tier-1
  - availability-open
schema_version: '0.1'
source_id: ecdc-erviss
source_url: https://github.com/EU-ECDC/Respiratory_viruses_weekly_data
manifest_section: §5.3
surveillance_category: respiratory
pathogens:
  - influenza
  - sars-cov-2
  - rsv
availability: open
availability_notes: null
access_type: github
tier: 1
cadence: weekly
geography_levels:
  - national
geography_countries:
  - AT
  - BE
  - BG
  - CY
  - CZ
  - DE
  - DK
  - EE
  - ES
  - FI
  - FR
  - GR
  - HR
  - HU
  - IE
  - IS
  - IT
  - LI
  - LT
  - LU
  - LV
  - MT
  - NL
  - 'NO'
  - PL
  - PT
  - RO
  - SE
  - SI
  - SK
gold_standard_for: []
vintaged_version_of: null
succeeds: null
derived_from: []
value_columns:
  - name: ili_rate
    unit: consultations per 100,000 population
    value_type: rate
    description: >-
      Influenza-like illness primary-care consultation rate per 100,000
      population per ECDC ERVISS methodology.
    aggregation: rate
  - name: ari_rate
    unit: consultations per 100,000 population
    value_type: rate
    description: >-
      Acute respiratory infection primary-care consultation rate per 100,000
      population. Broader case definition than ILI.
    aggregation: rate
notes:
  extra_columns:
    - column: age
      description: >-
        Reporting age band (`0-4`, `5-14`, `15-64`, `65+`, `total`). Filter to
        `total` for population-wide series.
    - column: location_name
      description: >-
        Source's English country name. `location_id` (ISO 3166-1 alpha-2) is
        canonical.
  interpretation_caveats:
    - column: ili_rate
      caveat: >-
        ILI is a *symptomatic* signal — patients meeting the ECDC ILI case
        definition (sudden fever ≥38°C plus cough/sore throat) regardless of lab
        confirmation. Captures non-flu respiratory illness too. Pair with ERVISS
        sentinel virological positivity for lab-confirmed flu.
    - column: ari_rate
      caveat: >-
        ARI is broader than ILI — any acute respiratory infection without
        requiring fever. Counts will exceed `ili_rate` and include more
        non-influenza causes.
    - column: location_id
      caveat: >-
        Greece is `GR` (ISO 3166-1 alpha-2). ECDC's internal `EL` code is not
        used in this dataset.
  general: >
    ECDC's ERVISS aggregates respiratory virus surveillance from 30+ EU/EEA
    countries.

    This dataset is the **primary-care syndromic** slice (ILI and ARI
    consultation rates);

    additional ERVISS slices (sentinel virological positivity, SARI severity,
    variants)

    can be added as sibling datasets later.


    Data is published weekly to the public GitHub repo at

    `EU-ECDC/Respiratory_viruses_weekly_data`. Each weekly commit is a snapshot
    —

    vintaged history is available via git but is not surfaced as `as_of` in this

    dataset.
extra:
  github_repo: https://github.com/EU-ECDC/Respiratory_viruses_weekly_data
  source_csv: data/ILIARIRates.csv
  erviss_dashboard: https://erviss.org/
computed:
  last_ingested: '2026-04-26T01:58:56Z'
  row_count: 26751
  time_coverage:
    - start: '2021-06-27'
      end: '2026-04-19'
  geography_unit_count: 28
  observed_cadence_days: 7
  missing_gaps: []
  data_hash: 1df84f26f0055222

ECDC ERVISS — ILI/ARI primary-care consultation rates

ECDC's ERVISS aggregates respiratory virus surveillance from 30+ EU/EEA countries. This dataset is the primary-care syndromic slice (ILI and ARI consultation rates); additional ERVISS slices (sentinel virological positivity, SARI severity, variants) can be added as sibling datasets later.

Data is published weekly to the public GitHub repo at EU-ECDC/Respiratory_viruses_weekly_data. Each weekly commit is a snapshot — vintaged history is available via git but is not surfaced as as_of in this dataset.

Source: https://github.com/EU-ECDC/Respiratory_viruses_weekly_data

Coverage

Time: 2021-06-27 → 2026-04-19
Cadence: weekly (observed median spacing: 7 days)
Geography levels: national — 28 unique location IDs
Countries: AT, BE, BG, CY, CZ, DE, DK, EE, ES, FI, FR, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MT, NL, NO, PL, PT, RO, SE, SI, SK
Pathogens: influenza, sars-cov-2, rsv
Surveillance category: respiratory
Rows: 26,751

Columns

Column	Unit	value_type	Aggregation	Description
`ili_rate`	consultations per 100,000 population	`rate`	`rate`	Influenza-like illness primary-care consultation rate per 100,000 population per ECDC ERVISS methodology.
`ari_rate`	consultations per 100,000 population	`rate`	`rate`	Acute respiratory infection primary-care consultation rate per 100,000 population. Broader case definition than ILI.

Additional data columns

age — Reporting age band (0-4, 5-14, 15-64, 65+, total). Filter to total for population-wide series.
location_name — Source's English country name. location_id (ISO 3166-1 alpha-2) is canonical.

Interpretation caveats

Things that may differ from how other sources define a similar measure. If you're combining this dataset with another, read these first.

ili_rate — ILI is a symptomatic signal — patients meeting the ECDC ILI case definition (sudden fever ≥38°C plus cough/sore throat) regardless of lab confirmation. Captures non-flu respiratory illness too. Pair with ERVISS sentinel virological positivity for lab-confirmed flu.
ari_rate — ARI is broader than ILI — any acute respiratory infection without requiring fever. Counts will exceed ili_rate and include more non-influenza causes.
location_id — Greece is GR (ISO 3166-1 alpha-2). ECDC's internal EL code is not used in this dataset.

Access

Availability: open
Access type: github
License: other
Tier: 1

Schema version 0.1 · Last ingested 2026-04-26T01:58:56Z · source_id: ecdc-erviss · Manifest section §5.3