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Testing for coronavirus is critical to our understanding of how widely the virus has spread and the data informs decisions on whether to tighten or ease lockdown measures. But are the tests for coronavirus fit for purpose?

Concerns have been raised about the tests’ accuracy. Some clinicians are worried that the tests are over-sensitive and could be picking up on the presence of virus fragments which are old or not actually infectious.

Kirsty Wark is joined by the World Health Organisation’s special Covid-19 envoy Dr David Nabarro and ICU Consultant Dr Ron Daniels.

Health Correspondent Deb Cohen reports.