Coronavirus: how accurate are coronavirus tests?

by Dr Jessica Watson, GP and NIHR Doctoral Senior Clinical Research Fellow, Centre for Academic Primary Care, University of Bristol and Dr Penny Whiting, Associate Professor in Clinical Epidemiology, NIHR ARC West and University of Bristol

Coronavirus testing has been the subject of huge interest, frustration and confusion. The UK has come under worldwide criticism for its lack of mass testing, despite the director general of WHO encouraging countries to “test, test, test”. Health Secretary Matt Hancock announced that the UK now aims to test 100,000 people a dayfor COVID-19 by the end of April.

There are two main types of COVID-19 tests. Swab tests, which usually take a sample from the throat or nose, to detect viral RNA. These determine if you currently have COVID-19. Blood tests, which detect antibodies, can determine if you have had COVID-19, and are therefore immune.

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