
https://www.cidrap.umn.edu/sites/default/files/public/downloads/cidrap-covid19-viewpoint-part1.pdf

https://www.npr.org/sections/health-shots/2020/06/22/880803278/how-germany-staffed-up-contact-tracing-teams-to-contain-its-coronavirus-outbreak?t=1602767268883&?ncid=newsltukhpmgpols&t=1602840505295&t=1602841634862

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/974507/20210331_-_CRED_Report_-_FINAL_-_Web_Accessible.pdf