Covid-19Regional Covid-19 COVID-19 – Thunder Bay District Two Active Cases By NetNewsLedger - October 18, 2021 848 Thunder Bay – COVID-19 Update – The Thunder Bay District Health Unit (TBDHU) is reporting 1 (one) new COVID-19 case in residents in the TBDHU Region. Currently the active cases is at 2. The case reported today is in a First Nation Community.