Tests conducted per new confirmed case of COVID-19

7-day rolling average. Comparisons across countries are affected by differences in testing policies and reporting methods.

Feb 15, 2020Jun 15, 2022Aug 8, 2020Feb 24, 2021Sep 12, 2021South Korea

Source: Official data collated by Our World in Data – Last updated 9 August 2023

Note: Our data on COVID-19 tests and positive rate is no longer updated since 23 June 2022.