Ohio officials recommend…local health departments shift their practice of COVID-19 contact tracing to a model that follows clusters of cases and not individual diagnoses. Schools can also discontinue universal contract tracing but should still plan to help health departments trace clusters of a coronavirus outbreak. That’s according to a memo sent to all districts and health departments, earlier this week. It instructs local health departments to focus on outbreaks in crowded settings such as homeless shelters, correctional facilities and nursing homes.