Covid-19Regional Covid-19 TBDHU Reports Two New COVID-19 Cases By NetNewsLedger - September 2, 2021 894 Thunder Bay – COVID-19 – The Thunder Bay District Health Unit (TBDHU) reports 2 (two) new COVID-19 cases in residents in the TBDHU Region. The current active cases is now at 11. The two new cases are in First Nation communities.