NHS COVID-19 contact tracing app averted between 200,000 and 900,000 infections, estimates infectious disease experts

For each 1% increase in users we estimate the number of cases will drop by between 0.8% and 2.3%.' Professor Christophe Fraser adds, 'Our work confirms the NHS COVID-19 app is sending exposure notifications to relevant contacts. The NHS COVID-19 contact tracing app is a powerful and sustainable public health tool. Close to half of the eligible population with compatible smartphones is already using the NHS COVID-19 app, but we should keep encouraging higher uptake. The epidemiological outlook remains concerning, and using the app can contribute to reducing infections until we are all vaccinated.'