July 17, 2020

Contact Tracing during Coronavirus Disease Outbreak, South Korea, 2020

Category: Article Summary

Topic: Public Health Policy and Practice

• Among 59,073 contacts of 5,706 COVID-19 index cases in South Korea monitored for an average of 9.9 days after index case diagnosis, 12% of household contacts acquired COVID-19, versus 2% for non-household contacts. Probability of a contact being positive was highest for household contacts when the index case was 10-19 years old (19%); however, only 2% of index cases were in this age group. Among non-household contacts, the highest proportion of positive contacts was among index case who were 70 years of age or older.    

Park et al. (Oct 2020). Contact Tracing during Coronavirus Disease Outbreak, South Korea, 2020. Emerging Infectious Diseases. https://doi.org/10.3201/eid2610.201315