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owid / covid-19-data

Data on COVID-19 (coronavirus) cases, deaths, hospitalizations, tests • All countries • Updated daily by Our World in Data
https://ourworldindata.org/coronavirus
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Negative values for new confirmed cases and deaths #747

Closed amirhome61 closed 3 years ago

amirhome61 commented 3 years ago

FIle: owid-covid-data.xlsx The fields new confirmed, new confirmed smoothed, new confirmed per million and new confirmed per million smoothed have negative values for the following countries: France, Luxembourg, Spain

Thanks for addressing this

Amir

edomt commented 3 years ago

We source our data on COVID-19 confirmed cases and deaths from the COVID-19 Data Repository by the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University: https://github.com/CSSEGISandData/COVID-19. This page also lists their sources, country by country. We report this data without alterations, but issues can be raised in their GitHub repository: https://github.com/CSSEGISandData/COVID-19/issues

The number of cases or deaths reported by any institution—including JHU, the WHO, the ECDC, and others—on a given day does not necessarily represent the actual number on that date. This is because of the long reporting chain that exists between a new case/death and its inclusion in statistics. This also means that negative values in cases and deaths can sometimes appear when a country corrects historical data, because it had previously overestimated the number of cases/deaths.