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Number of daily COVID-19 tests per thousand people

There are extremely large differences between countries as this chart shows.

Some countries do very few tests.

What is counted as a test? The number of tests does not refer to the same in each country – one difference is that some countries report the number of people tested, while others report the number of tests (which can be higher if the same person is tested more than once). And other countries report their testing data in a way that leaves it unclear what the test count refers to exactly.

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Total number of COVID-19 tests in each country

To allow comparisons between countries it is again shown relative to the size of the population.

In all our charts you can download the data: We want everyone to built on top of our work and therefore we always make all our data always available for download.

Click on the ‘Data’-tab below the chart and you can download the shown data for all countries in a simple to use csv file.

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How many tests did a country do to find one COVID-19 case?

This chart brings our data on testing together with the data on confirmed cases.

The chart answers the question: How many tests did a country do to find one COVID-19 case?

• Some countries – for example Taiwan and Vietnam – did a large number of tests per each confirmed case.

• For others the ratio is more than two orders of magnitude lower. These countries found a case for every few tests they did.

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Correlation between tests per capita and GDP per capita

This shows the correlation between tests per capita and GDP per capita.

There are a few exceptions, but poorer countries tend to do fewer tests for COVID-19.

This suggests that particularly in poorer countries the number of total cases is likely much higher than the number of confirmed cases.

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