Modeling study: Contact tracing and testing must be fast to be useful

Impact of delays on effectiveness of contact tracing strategies for COVID-19: a modelling study – The Lancet Public Health

Commentaries: Quick testing is needed for coronavirus contact tracing to be most effective, research finds – CNN AND Speed of testing is most critical factor in the success of contact tracing strategies to slow COVID-19 transmission – The Lancet AND Expert reaction to paper looking at COVID-19 contact tracing strategies and speed of testing – Science Media Centre AND Can digital contact tracing make up for lost time? – The Lancet Public Health

Related Commentary on Twitter

NEW—Speed of testing is most critical factor in success of contact tracing strategies to slow #COVID19; a delay of 3 days or more between symptom onset & testing will not reduce onward transmission of virus sufficiently: a modelling study @TheLancetPH https://t.co/fMuK523UzM pic.twitter.com/Nf2aEU0NIG

— The Lancet (@TheLancet) July 17, 2020