Contact tracing may have averted 1.4 million US COVID cases in 2 months
A Centers for Disease Control and Prevention (CDC) modeling study used data from 59 US case investigation and contact tracing (CICT) programs to estimate that the programs prevented 1.11 to 1.36 million COVID-19 cases, and 27,000 to 34,000 hospitalizations over 60 days in winter 2020-21, well before the Delta and Omicron variant surges.