TY - JOUR T1 - Local, state agencies using contact tracing to halt coronavirus spread: 100,000 more tracers needed across US JF - The Nation's Health JO - Nations Health SP - 1 LP - 14 VL - 50 IS - 5 AU - Mark Barna Y1 - 2020/07/01 UR - http://www.thenationshealth.org/content/50/5/1.2.abstract N2 - When residents of a San Francisco household tested positive in March for COVID-19, they were isolated in a hotel. People who lived in the home who tested negative were asked to self-quarantine to prevent spread of the disease. ER -