World Health Organisation (WHO) officials have stressed the importance of “feet on the ground” in the fight against the coronavirus pandemic. Mike Ryan, the organisation’s emergencies expert, made the comments at an online press conference in Geneva. He highlighted the role of “shoe-leather epidemiology” in bring the pandemic under control in both South Korea and Singapore. Contact-tracing apps have played an increasing role in the response to the coronavirus, with the UK trialling its own app on the Isle of Wight this week.