Study tracks the spread of Covid-19 in Sweden
By bodil [dot] malmstrom [at] fsi [dot] lu [dot] se (Bodil Malmström) - published 9 June 2021 Since April 2020, volunteer participants 18 years and older who reside in Sweden have been eligible to report daily their health status in the free app. Photo: iStockphoto During the pandemic, the free COVID Symptom Study app has helped researchers understand the complexity and spread of the corona virus
https://www.lunduniversity.lu.se/article/study-tracks-spread-covid-19-sweden - 2025-03-12