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Data

Weekly confirmed COVID-19 cases

See all data and research on:
COVID-19Global Health
Data sources and processing
Insights about this data
Data sources and processingRelated articlesRelated charts
Insights about this dataRelated articlesRelated charts

What you should know about this indicator

  • Confirmed cases represent the number of laboratory-confirmed COVID-19 infections as reported to WHObut may not capture the true scale of infection due to varying testing strategiescase definitionsand underreporting.
  • Data are presented by date of reporting rather than symptom onsetand retrospective updates or corrections by countries can lead to sudden spikes or negative values.
  • Since WHO relies on Member State reportingdifferences in local definitionstesting capacitiesand reporting practices can affect international comparisons and trending over time.
  • We provide more detail on these points in Cases of COVID-19: background.
Weekly confirmed COVID-19 cases
Cumulative number of confirmed cases of COVID-19 over the previous week. Counts can include probable caseswhere reported.
Source
World Health Organization (2025) – processed by Our World in Data
Last updated
December 92025
Next expected update
January 2026
Unit
cases

Related research and writing

Coronavirus (COVID-19) Cases

Edouard MathieuHannah RitchieLucas Rodés-GuiraoCameron AppelDaniel GavrilovCharlie GiattinoJoe HasellBobbie MacdonaldSaloni DattaniDiana BeltekianEsteban Ortiz-Ospinaand Max Roser
Thumbnail for article '17 key charts to understand the COVID-19 pandemic'

17 key charts to understand the COVID-19 pandemic

Saloni Dattani and Lucas Rodés-Guirao

What you should know about this indicator

  • Confirmed cases represent the number of laboratory-confirmed COVID-19 infections as reported to WHObut may not capture the true scale of infection due to varying testing strategiescase definitionsand underreporting.
  • Data are presented by date of reporting rather than symptom onsetand retrospective updates or corrections by countries can lead to sudden spikes or negative values.
  • Since WHO relies on Member State reportingdifferences in local definitionstesting capacitiesand reporting practices can affect international comparisons and trending over time.
  • We provide more detail on these points in Cases of COVID-19: background.
Weekly confirmed COVID-19 cases
Cumulative number of confirmed cases of COVID-19 over the previous week. Counts can include probable caseswhere reported.
Source
World Health Organization (2025) – processed by Our World in Data
Last updated
December 92025
Next expected update
January 2026
Unit
cases

Sources and processing

This data is based on the following sources

World Health Organization – COVID-19 Dashboard

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

From the 31 December 2019 to the 21 March 2020WHO collected the numbers of confirmed COVID-19 cases and deaths through official communications under the International Health Regulations (IHR2005)complemented by monitoring the official ministries of health websites and social media accounts. Since 22 March 2020global data is compiled through WHO region-specific dashboardsand/or aggregate count data reported to WHO headquarters.

WHO COVID-19 Dashboard is updated every Friday for the period of two weeks prior.

Counts primarily reflect laboratory-confirmed cases and deathsbased upon WHO case definitions; although some departures may exist due to local adaptations. Counts include both domestic and repatriated cases. Case detectiondefinitionstesting strategiesreporting practiceand lag times (e.g. time to case notificationand time to reporting of deaths) differ between countriesterritories and areas. These factorsamongst othersinfluence the counts presented with variable under or overestimation of true case and death countsand variable delays to reflecting these data at a global level.

All data represent date of reporting as opposed to date of symptom onset. All data are subject to continuous verification and may change based on retrospective updates to accurately reflect trendschanges in country case definitions and/or reporting practices. Significant data errors detected or reported to WHO may be corrected at more frequent intervals.

New case and death counts from the Region of the Americas Starting from the week commencing on 11 September 2023the source of the data from the Region of the Americas was switched to the aggregated national surveillancesreceived through the COVID-19InfluenzaRSV and Other Respiratory Viruses program in the Americas. Data have been included retrospectively since 31 July 2023.

Rates <0.001 per 100,000 population may be rounded to 0.

Retrieved on
December 92025
Retrieved from
https://covid19.who.int/
Citation
This is the citation of the original data obtained from the sourceprior to any processing or adaptation by Our World in Data. To cite data downloaded from this pageplease use the suggested citation given in Reuse This Work below.
WHO COVID-19 Dashboard. Geneva: World Health Organization2020. Available online: https://covid19.who.int/

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

From the 31 December 2019 to the 21 March 2020WHO collected the numbers of confirmed COVID-19 cases and deaths through official communications under the International Health Regulations (IHR2005)complemented by monitoring the official ministries of health websites and social media accounts. Since 22 March 2020global data is compiled through WHO region-specific dashboardsand/or aggregate count data reported to WHO headquarters.

WHO COVID-19 Dashboard is updated every Friday for the period of two weeks prior.

Counts primarily reflect laboratory-confirmed cases and deathsbased upon WHO case definitions; although some departures may exist due to local adaptations. Counts include both domestic and repatriated cases. Case detectiondefinitionstesting strategiesreporting practiceand lag times (e.g. time to case notificationand time to reporting of deaths) differ between countriesterritories and areas. These factorsamongst othersinfluence the counts presented with variable under or overestimation of true case and death countsand variable delays to reflecting these data at a global level.

All data represent date of reporting as opposed to date of symptom onset. All data are subject to continuous verification and may change based on retrospective updates to accurately reflect trendschanges in country case definitions and/or reporting practices. Significant data errors detected or reported to WHO may be corrected at more frequent intervals.

New case and death counts from the Region of the Americas Starting from the week commencing on 11 September 2023the source of the data from the Region of the Americas was switched to the aggregated national surveillancesreceived through the COVID-19InfluenzaRSV and Other Respiratory Viruses program in the Americas. Data have been included retrospectively since 31 July 2023.

Rates <0.001 per 100,000 population may be rounded to 0.

Retrieved on
December 92025
Retrieved from
https://covid19.who.int/
Citation
This is the citation of the original data obtained from the sourceprior to any processing or adaptation by Our World in Data. To cite data downloaded from this pageplease use the suggested citation given in Reuse This Work below.
WHO COVID-19 Dashboard. Geneva: World Health Organization2020. 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 datathis can include standardizing country names and world region definitionsconverting unitscalculating derived indicators such as per capita measuresas 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 pipelineincluding links to all the code used to prepare data across Our World in Data.

Read about our data pipeline

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 onso we ask you to always cite them appropriately (see below). This is crucial to allow data providers to continue doing their workenhancingmaintaining and updating valuable data.
  • All datavisualizationsand code produced by Our World in Data are completely open access under the Creative Commons BY license. You have the permission to usedistributeand reproduce these in any mediumprovided the source and authors are credited.

Citations

How to cite this page

To cite this page overallincluding any descriptionsFAQs or explanations of the data authored by Our World in Dataplease use the following citation:

“Data Page: Weekly confirmed COVID-19 cases”part of the following publication: Edouard MathieuHannah RitchieLucas Rodés-GuiraoCameron AppelDaniel GavrilovCharlie GiattinoJoe HasellBobbie MacdonaldSaloni DattaniDiana BeltekianEsteban Ortiz-Ospinaand Max Roser (2020) - “COVID-19 Pandemic”. Data adapted from World Health Organization. Retrieved from https://archive.ourworldindata.org/20251209-063408/grapher/weekly-covid-cases.html [online resource] (archived on December 92025).

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:

World Health Organization (2025) – processed by Our World in Data

Full citation

World Health Organization (2025) – processed by Our World in Data. “Weekly confirmed COVID-19 cases” [dataset]. World Health Organization“COVID-19 Dashboard WHO COVID-19 Dashboard - Daily cases and deaths” [original data]. Retrieved December 92025 from https://archive.ourworldindata.org/20251209-063408/grapher/weekly-covid-cases.html (archived on December 92025).