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Data

Tests conducted per new confirmed case of COVID-19

About this data

Tests conducted per new confirmed case of COVID-19
The number of tests each day divided by the number of confirmed cases each day. The series is smoothed by averaging daily figures over a rolling 7-day window.
Source
Official data collated by Our World in Data (2022); World Health Organization (2024) – with major processing by Our World in Data
Last updated
December 18, 2024
Unit
tests per confirmed case

Related research and writing

Coronavirus (COVID-19) Testing

Edouard Mathieu, Hannah Ritchie, Lucas Rodés-Guirao, Cameron Appel, Daniel Gavrilov, Charlie Giattino, Joe Hasell, Bobbie Macdonald, Saloni Dattani, Diana Beltekian, Esteban Ortiz-Ospina and Max Roser

Sources and processing

This data is based on the following sources

This data is collected by the Our World in Data team from official reports.

On 23 June 2022, we stopped adding new datapoints to our COVID-19 testing dataset. You can read more at https://github.com/owid/covid-19-data/discussions/2667.

The data produced by third parties and made available by Our World in Data is subject to the license terms from the original third-party authors. We will always indicate the original source of the data in our database, and you should always check the license of any such third-party data before use.

Retrieved on
August 9, 2024
Retrieved from
https://github.com/owid/covid-19-data/
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
Hasell, J., Mathieu, E., Beltekian, D. et al. A cross-country database of COVID-19 testing. Sci Data 7, 345 (2020). https://doi.org/10.1038/s41597-020-00688-8
The data has been obtained from different sources depending on the country:

Daily COVID-19 cases and deaths by date reported to WHO

Retrieved on
December 18, 2024
Retrieved from
https://covid19.who.int/
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
WHO COVID-19 Dashboard. Geneva: World Health Organization, 2020. Available online: https://covid19.who.int/

How we process data at Our World in Data

All data and visualizations on Our World in Data rely on data sourced from one or several original data providers. Preparing this original data involves several processing steps. Depending on the data, this can include standardizing country names and world region definitions, converting units, calculating derived indicators such as per capita measures, as well as adding or adapting metadata such as the name or the description given to an indicator.

At the link below you can find a detailed description of the structure of our data pipeline, including links to all the code used to prepare data across Our World in Data.

Read about our data pipeline
Notes on our processing step for this indicator

Not all countries report testing data on a daily basis. To generate this series we assume that testing changed equally on a daily basis over any periods in which no data was reported.

Reuse this work

  • All data produced by third-party providers and made available by Our World in Data are subject to the license terms from the original providers. Our work would not be possible without the data providers we rely on, so we ask you to always cite them appropriately (see below). This is crucial to allow data providers to continue doing their work, enhancing, maintaining and updating valuable data.
  • All data, visualizations, and code produced by Our World in Data are completely open access under the Creative Commons BY license. You have the permission to use, distribute, and reproduce these in any medium, provided the source and authors are credited.

Citations

How to cite this page

To cite this page overall, including any descriptions, FAQs or explanations of the data authored by Our World in Data, please use the following citation:

“Data Page: Tests conducted per new confirmed case of COVID-19”. Our World in Data (2024). Data adapted from Official data collated by Our World in Data, World Health Organization. Retrieved from https://ourworldindata.org/grapher/tests-per-confirmed-case-daily-smoothed [online resource]
How to cite this data

In-line citationIf you have limited space (e.g. in data visualizations), you can use this abbreviated in-line citation:

Official data collated by Our World in Data (2022); World Health Organization (2024) – with major processing by Our World in Data

Full citation

Official data collated by Our World in Data (2022); World Health Organization (2024) – with major processing by Our World in Data. “Tests conducted per new confirmed case of COVID-19” [dataset]. Official data collated by Our World in Data, “COVID-19, testing”; World Health Organization, “COVID-19 Dashboard WHO COVID-19 Dashboard - Daily cases and deaths” [original data]. Retrieved December 19, 2024 from https://ourworldindata.org/grapher/tests-per-confirmed-case-daily-smoothed