ECDC ILI

Attribute	Details
Source Name	ecdc_ili
Data Source	European Centre for Disease Prevention and Control (ECDC)
Geographic Levels	European countries (see Geographic Codes)
Temporal Granularity	Weekly (Epiweek)
Reporting Cadence	Inactive - No longer updated since 2020w12
Temporal Scope Start	2018w40
License	CC BY 4.0 (with attribution to ECDC)

Overview

This endpoint provides weekly influenza-like illness (ILI) incidence rates for European countries. Data is sourced from the European Centre for Disease Prevention and Control (ECDC).

General topics not specific to any particular endpoint are discussed in the API overview. Such topics include: contributing, citing, and data licensing.

Table of contents

1. Estimation
2. The API
   1. Parameters
      1. Required
      2. Optional
   2. Response
3. Example URLs
   1. ECDC ILI in Austria on 2020w01
4. Code Samples
   1. Legacy Clients

Estimation

Values represent ILI incidence rates (cases per 100,000 population) as reported and presented by the ECDC. Data is subject to backfill if the source provides historical revisions.

The API

The base URL is: https://api.delphi.cmu.edu/epidata/ecdc_ili/

Parameters

Required

Parameter	Description	Type
epiweeks	epiweeks (see Date Formats)	list of epiweeks
regions	regions	list of European country labels (see Geographic Codes)

Optional

Parameter	Description	Type
issues	issues (see Date Formats)	list of epiweeks
lag	# weeks between each epiweek and its issue	integer

Notes:

• If both issues and lag are specified, only issues is used.
• If neither is specified, the current issues are used.

Response

Field	Description	Type
result	result code: 1 = success, 2 = too many results, -2 = no results	integer
epidata	list of results	array of objects
epidata[].release_date	date of release	string
epidata[].region	region name	string
epidata[].issue	epiweek of issue	integer
epidata[].epiweek	epiweek of data	integer
epidata[].lag	lag in weeks	integer
epidata[].incidence_rate	ILI incidence rate (cases per 100,000 population)	float
message	success or error message	string

Example URLs

ECDC ILI in Austria on 2020w01

https://api.delphi.cmu.edu/epidata/ecdc_ili/?regions=austria&epiweeks=202001

{
  "result": 1,
  "epidata": [
    {
      "release_date":"2020-03-26",
      "region": "Austria",
      "issue": 202012,
      "epiweek": 202001,
      "lag": 11,
      "incidence_rate": 406.60630449
    }
  ],
  "message": "success"
}

Code Samples

Libraries are available for R and Python. The following samples show how to import the library and fetch ECDC ILI data for Austria for epiweeks 202001 and 202002.

Install the package using pip:

pip install -e "git+https://github.com/cmu-delphi/epidatpy.git#egg=epidatpy"

# Import
from epidatpy import CovidcastEpidata, EpiDataContext, EpiRange
# Fetch data
epidata = EpiDataContext()
res = epidata.ecdc_ili(['austria'], [202001, 202002])
print(res['result'], res['message'], len(res['epidata']))

library(epidatr)
# Fetch data
res <- pub_ecdc_ili(regions = 'austria', epiweeks = c(202001, 202002))
print(res)

Legacy Clients

We recommend using the modern client libraries mentioned above. Legacy clients are also available for Python, R, and JavaScript.

Optionally install the package using pip(env):

pip install delphi-epidata

Otherwise, place delphi_epidata.py from this repo next to your python script.

# Import
from delphi_epidata import Epidata
# Fetch data
res = Epidata.ecdc_ili(['austria'], [202001, 202002])
print(res['result'], res['message'], len(res['epidata']))

Place delphi_epidata.R from this repo next to your R script.

source("delphi_epidata.R")
# Fetch data
res <- Epidata$ecdc_ili(regions = list("austria"), epiweeks = list(202001, 202002))
print(res$message)
print(length(res$epidata))

<!-- Imports -->
<script src="delphi_epidata.js"></script>
<!-- Fetch data -->
<script>
  EpidataAsync.ecdc_ili('austria', [202001, 202002]).then((res) => {
    console.log(res.result, res.message, res.epidata != null ? res.epidata.length : 0);
  });
</script>