Related Articles COVID 19 epidemic in Switzerland on the importance of testing contact tracing and isolation Swiss Med Wkly 2020 03 09 150 w20225 Authors Salath M Althaus CL Neher R Stringhini S Hodcroft E Fellay J Zwahlen M Senti G Battegay M Wilder Smith A Eckerle I Egger M Low N Abstract Switzerland is among the countries with the highest number of coronavirus disease 2019 COVID 19 cases per capita in the world There are likely many people with undetected SARS CoV 2 infection because testing efforts are currently not detecting all infected people including some with clinical disease compatible with COVID 19 Testing on its own will not stop the spread of SARS CoV 2 Testing is part of a strategy The World Health Organization recommends a combination of measures rapid diagnosis and immediate isolation of cases rigorous tracking and precautionary self isolation of close contacts In this article we explain why the testing strategy in Switzerland should be strengthened urgently as a core component of a combination approach to control COVID 19 PMID 32191813 PubMed indexed for MEDLINE