On 27 May 2020 DELVE published Test, Trace, Isolate. The Royal Society’s overview stresses that success depends on speed, compliance and monitoring.

The report argues that TTI can contribute to controlling the epidemic only as part of a wider package of public-health measures. Modelling in the supporting addendum — co-authored by Andrei Paleyes with Bobby He, Bryn Elesedy, Michael Hutchinson, Sheheryar Zaidi, Guy Harling, Anne Johnson and Yee Whye Teh — finds that adding extra-household contact tracing to distancing and household isolation reduces new infections by roughly 5–15%, with the upper end when the test-and-trace cycle is shortened from five days to three.

Alongside the report, the team released TTI-Explorer, open simulation software (Andrei first author) for exploring TTI strategies and distancing measures. Code is on GitHub. Background is on the DELVE project page.