Advocate researchers to study potential inequities in long COVID diagnoses Dec 8, 2023 | COVID-19 Update, On The Record, People Watching, Public Health, Top Stories, Workforce Researchers at Advocate Health Care are set to explore whether providers are under-diagnosing long COVID in Chicago's Black community.To access this content, you must purchase 1 Year Health News Illinois Subscription or 1 Year Group Subscription - Up to 5 Users, or log in if you are a member.