1. Covid-19: Lack of capacity led to halting of community testing in March, admits deputy chief medical officer
2. University of Oxford. Digital contact tracing can slow or even stop coronavirus transmission and ease us out of lockdown. Apr 2020. www.ox.ac.uk/news/2020-04-16-digital-contact-tracing-can-slow-or-even-stop-coronavirus-transmission-and-ease-us.
3. Kelion L. Coronavirus: NHS contact tracing app to target 80% of smartphone users. BBC News. Apr 2020. https://www.bbc.co.uk/news/technology-52294896.
4. Culnane C, Teague V. Security analysis of the NHS COVID-19 App. May 2020. https://www.stateofit.com/UKContactTracing.
5. Directorate of Health of Iceland. Contagion tracing is a community affair https://www.covid.is/app/en.