Lessons from Iceland, a model country for #COVID19 containment, from extensive population testing and virus sequencing
https://www.nejm.org/doi/full/10.1056/NEJMoa2006100?query=featured_home @NEJM

I want to add 2 notable points I learned from this report
1. Iceland began testing for #COVID19 1 month before a patient there was diagnosed
2. 43% of the participants testing positive had no symptoms
(some likely were pre-symptomatic)