Coronavirus test results must come in 24 hours, says Sage scientist


An enormous enlargement of testing will nonetheless depart Britain struggling to maintain Covid-19 infections below management except the system can inform individuals they’re optimistic inside 24 hours, one of many authorities’s most senior scientific advisers has warned.

Ministers have insisted that they’re on track to hit a goal of 500,000 tests a day by the tip of the month, with options this weekend that functionality of 1,000,000 assessments a day could possibly be reached by Christmas.

However, Graham Medley, a member of the federal government’s Scientific Advisory Group for Emergencies (Sage) and chair of its subcommittee on modelling, stated that returning test results “ideally within 24 hours” was as important as capability in a profitable test-and-trace system. He stated if mandatory, capability needs to be curbed in favour of pace.

His recommendation is at odds with testimony from Dido Harding, the Conservative peer who heads NHS Test and Trace. When demand for tests was surging last month, she stated a “conscious decision” was made to increase the turnaround time.

There are nonetheless vital delays in the test-and-trace system, in keeping with the most recent figures. In the primary week of October, 32.8% of assessments performed at regional test websites have been returned inside 24 hours. The determine was 24.4% for native walk-in websites and 41.9% for cell testing websites. The variety of home-testing kits acquired inside 48 hours was 16%.

Medley instructed the Observer: “There’s been an enormous advance in phrases of the capability for testing, however I feel we’re nonetheless studying the way to optimise the usage of that testing. The size of time it takes to get the test result’s important for the contact-tracing. And so there needs to be a possible compromise between the quantity of testing completed and the flexibility to return the end result, ideally inside 24 hours.








Graham Medley says quantity is simply necessary if the test results could be produced promptly. Photograph: BBC Newsnight

“Suppose you could treble the number of tests you did, but only at the expense of returning them in a longer period of time, then that’s not really going to work. The volume is important, but only if it can be done promptly. The people doing it need to consider that delay as being as important as the volume.”

Sir Paul Nurse, the Nobel laureate and director of the Francis Crick Institute in London, stated utilizing smaller labs alongside the large, privately run Lighthouse labs may pace issues up. “Big labs have very long lines of communication,” he stated. “For very good reasons, they find it difficult to get the sample into them and the information aggregated rapidly. I call [our small labs] lifeboat labs. It’s local, it’s small. It’s a different way of working. Government should think about supporting them, as well as their big labs. We could have repurposed 20 to 30 labs in a month. We may still be able to, but we’ve lost a bit of goodwill.”

The warning over the pace of test results comes amid mounting concerns over tracing efforts. Last week noticed one other file low for reaching the contacts of those that examined optimistic, with solely 62.6% of shut contacts reached in England. Almost 250,000 contacts of people that have examined optimistic in England haven’t been reached by tracers because the finish of May, in keeping with Labour’s evaluation of test-and-trace knowledge. The analysis, verified by the House of Commons library, discovered that in the final week for which knowledge is out there, virtually 80,000 shut contacts weren’t notified.

Local public well being consultants once more demanded a rethink. Dr Jeanelle de Gruchy, president of the Association of Directors of Public Health, stated: “As is obvious from the most recent efficiency figures, the nationwide factor nonetheless requires vital and pressing enchancment. That means fast entry to, and turnaround of, testing and at the least 80% of contacts reached, as advisable by Sage in May.

“Locally, directors of public health have developed their own contact-tracing functions to supplement what is happening nationally. This approach has proved effective at reaching the areas and communities that the national system cannot. They are also managing, with PHE [Public Health England] colleagues, more complex contact tracing and outbreaks in settings like schools, care homes and businesses. More funding and resources are critical to keep doing this valuable work.”

A Department of Health spokesperson stated: “NHS Test and Trace is breaking chains of transmission – over 900,000 individuals who might in any other case have unknowingly unfold coronavirus have been contacted and instructed to isolate. The quantity of people that have been reached and requested to offer details about their contacts, has elevated from 74.9% to 76.8% this week.

“We’re persevering with to drive ahead native contact tracing as a part of our dedication to being regionally led, with greater than 100 Local Tracing Partnerships now working, and extra to come.

“Since its launch, 84% of contacts have been reached and told to self-isolate where communication details were provided.”



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