PT - JOURNAL ARTICLE AU - Barna, Mark TI - Local, state agencies using contact tracing to halt coronavirus spread: 100,000 more tracers needed across US DP - 2020 Jul 01 TA - The Nation's Health PG - 1--14 VI - 50 IP - 5 4099 - http://www.thenationshealth.org/content/50/5/1.2.short 4100 - http://www.thenationshealth.org/content/50/5/1.2.full SO - Nations Health2020 Jul 01; 50