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View our work on COVID-19 vaccinations

Total COVID-19 tests conducted vs. Confirmed cases

A high number of confirmed cases for a given level of testing gives an indication that the number of confirmed cases heavily underestimates the true number of
infections.

Total confirmed cases of COVID-1910,000100,0001 million10 million2,625Totaltests10%10%50%50%20%20%5%5%2%2%1%1%Positive rate = 100%Positive rate = 100%0.5%0.5%ArmeniaArmeniaAustraliaAustraliaAustriaAustriaAzerbaijanAzerbaijanBangladeshBangladeshBhutanBhutanColombiaColombiaCote d'IvoireCote d'IvoireCyprusCyprusGabonGabonIcelandIcelandIndiaIndiaPolandPolandRussiaRussiaTogoTogoAfricaAsiaEuropeNorth AmericaOceaniaSouth America
OurWorldInData.org/coronavirus •

Source: Testing data from official sources collated by Our World in Data, confirmed cases from Johns Hopkins University CSSE

Note: Comparisons of testing data across countries are affected by differences in the way the data are reported. Details can be found at our Testing Dataset page.

Jan 22, 2020
Nov 16, 2021

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