How Sure Can We Be about a COVID-19 Test Result if the Tests Are Not Perfectly Accurate?

Abstract

In this Commentary, we show how the interpretation of test results is affected by a test’s reliability rate. Moreover, we discuss how test fallibility may affect the use of tests as a tool to curb the spread of a disease. In particular, we show how administering inexpensive and less precise tests that can be conducted multiple times may be a more efficient way of curbing the pandemic than administering expensive more precise tests once.