 In this study, researchers found that artificial intelligence, AI, systems can detect changes in cough frequency that temporarily correlate with the onset of clinical disease at the individual level. They also observed a weak temporal correlation between aggregated coughs and the incidence of COVID-19 in the local population. However, technical issues affected uptake and regular use of the system. This article was authored by Juan C. Gabaldonfiguera, Eric Keane, Gerard Gimenez, and others.