Covid-19: Testing

Baroness Thornton Excerpts

Thursday 14th May 2020 Lords Chamber

[Lord Bethell]

The noble Lord will know that we have set up one of the most ambitious surveys, conducted by the ONS, to study on a weekly basis a large number of viral and serological tests. Those are used by statisticians to understand both the prevalence and the spread of the disease. Figures for that are emerging—we now have three weeks-worth of figures. They are being published regularly and I would be glad to send the noble Lord a link to the relevant data.

[Baroness Thornton (Lab)]

My question is relevant to what has been in the news today concerning antibody testing. PCR testing is the most reliable but most resource-intensive test. Will it ever be sufficiently scalable for widespread regular testing of all key workers and to track clusters of reinfection? Are the Government investigating the potential of increasing the reliability of antibody testing by double testing? Now that a range of tests is being manufactured globally, will the Government publish their assessment of their relative efficacy in testing the two relevant antibodies?

[Lord Bethell]

The noble Baroness is entirely right. PCR testing is an important guide as to who has the virus, and we have made it available to all key workers who exhibit symptoms. However, we are sceptical of whole-population surveys. Double testing might help if there is damage to serological equipment, but the challenges of serological testing are more to do with the blood, and unfortunately people do not change their blood. We are very proud of British universities, which regularly publish assessments of the various serological approaches. That work is under way and continues, and we hope to make more progress on it in the months ahead.