NIDSS Flu

This is the documentation of the API for accessing the NIDSS Flu (nidss_flu) endpoint of the Delphi’s epidemiological data.

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

NIDSS Flu Data

Outpatient ILI from Taiwan’s National Infectious Disease Statistics System (NIDSS).

Source: Taiwan CDC
Temporal Resolution: Weekly* from 2008w14
Spatial Resolution: By hexchotomy region (6+1)
Open access

* Data is usually released on Tuesday

The API

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

See this documentation for details on specifying epiweeks, dates, and lists.

Parameters

Required

Parameter	Description	Type
`epiweeks`	epiweeks	`list` of epiweeks
`regions`	regions	`list` of region labels

Optional

Parameter	Description	Type
`issues`	issues	`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 when record was first published (yyyy-MM-dd)	string
`epidata[].region`	region	string
`epidata[].issue`	epiweek of publication	integer
`epidata[].epiweek`	epiweek during which the data was collected	integer
`epidata[].lag`	number of weeks between `epiweek` and `issue`	integer
`epidata[].visits`	total number of patients with ILI	integer
`epidata[].ili`	percent ILI	float
`message`	`success` or error message	string

Example URLs

NIDSS Flu on 2015w01 (nationwide)

https://delphi.cmu.edu/epidata/nidss_flu/?regions=nationwide&epiweeks=201501

{
  "result": 1,
  "epidata": [
    {
      "release_date": "2016-01-05",
      "region": "Nationwide",
      "issue": 201552,
      "epiweek": 201501,
      "lag": 51,
      "visits": 65685,
      "ili": 1.21
    }
  ],
  "message": "success"
}

Code Samples

Libraries are available for JavaScript, Python, and R. The following samples show how to import the library and fetch national NIDSS Flu data for epiweeks 201440 and 201501-201510 (11 weeks total).

JavaScript (in a web browser)

<!-- Imports -->
<script src="delphi_epidata.js"></script>
<!-- Fetch data -->
<script>
  EpidataAsync.nidss_flu('nationwide', [201440, EpidataAsync.range(201501, 201510)]).then((res) => {
    console.log(res.result, res.message, res.epidata != null ? res.epidata.length : 0);
  });;
</script>

Python

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.nidss_flu(['nationwide'], [201440, Epidata.range(201501, 201510)])
print(res['result'], res['message'], len(res['epidata']))

R

# Import
source('delphi_epidata.R')
# Fetch data
res <- Epidata$nidss_flu(list('nationwide'), list(201440, Epidata$range(201501, 201510)))
cat(paste(res$result, res$message, length(res$epidata), "\n"))