covid-testing-latest-data-source-details: 46
This data as json, copyable
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rowid
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ISO code
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Entity
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Date
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Source URL
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Source label
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Notes
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Number of observations
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Cumulative total
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Cumulative total per thousand
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Daily change in cumulative total
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Daily change in cumulative total per thousand
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7-day smoothed daily change
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7-day smoothed daily change per thousand
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Short-term positive rate
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Short-term tests per case
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General source label
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General source URL
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Short description
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Detailed description
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| 46 |
ITA |
Italy - tests performed |
2020-10-27 |
https://github.com/pcm-dpc/COVID-19/tree/master/dati-andamento-nazionale |
Presidency of the Council of Ministers |
Made available by the Department of Civil Protection on GitHub |
247 |
14953086 |
247.31400000000002 |
174398 |
2.884 |
166986 |
2.762 |
0.102 |
9.805 |
Ministero della Salute |
http://www.salute.gov.it/portale/nuovocoronavirus/dettaglioContenutiNuovoCoronavirus.jsp?lingua=italiano&id=5351&area=nuovoCoronavirus&menu=vuoto |
The number of tests performed. |
The official data provided by the Ministry of Health is compiled by the Department of Civil Protection on [GitHub](https://github.com/pcm-dpc/COVID-19). Figures relate to the total number of tests performed. This figure is available for each individual region separately at the source indicated. However it appears that data is missing for individual regions for particular dates – we assume that these are also missing from the aggregate total for Italy that we provide. The list of missing data, in English, can be seen at the bottom of [this data dashboard built by Franco Mossotto](https://datastudio.google.com/u/0/reporting/91350339-2c97-49b5-92b8-965996530f00/page/RdlHB).
It is clear that there are delays in timeline running up to a test being reported – both in terms of the time it takes for a symptomatic person to receive a test, and in the time for that test to then get reported in the data. For one region, Lombardy, [an investigation](https://arxiv.org/ftp/arxiv/papers/2003/2003.09320.pdf) found the latter delay in the early period of the outbreak to be around 3-4 days.
There is significant variation in testing practices – in terms of how many tests are conducted and how they are allocated across the population – across regions and these practices have also changed over time. The extent to which tests pending results are included appears to vary across regions.
Pietro Monticone and Riccardo Valperga have written a very helpful and detailed description of these data quality issues [here in GitHub](https://pitmonticone.github.io/covid-italy/owid-testing-italy.html).
Note that, due to the way the data is presented by the official source, the time series may be impacted by retrospective revisions made by the source – see our [FAQ here](https://ourworldindata.org/coronavirus-testing#does-your-data-reflect-retrospective-updates-made-by-the-source). |