November 3, 2020

Outcomes of Contact Tracing in San Francisco, California—Test and Trace During Shelter-in-Place

Category: Article Summary

Topic: Testing and Treatment

Keywords (Tags): testing

From April 13 to June 8, San Francisco’s contact tracing program was able to reach 85% (1,394 out of 1,633) of reported cases and subsequent contacts and secondary cases for interviews. People who identified as Latino represented a majority of these cases, despite comprising 15% of San Francisco residents. The secondary household attack proportion (percentage of contacts testing positive) was found to be much higher than the non-household attack proportion (11.4% vs 3.9%), and household contacts represented 90% of secondary cases.

Sachdev et al. (Nov 2, 2020). Outcomes of Contact Tracing in San Francisco, California—Test and Trace During Shelter-in-Place. JAMA Internal Medicine. https://doi.org/10.1001/jamainternmed.2020.5670