On 7 March, a doctor in Victoria had tested positive for COVID-19. The doctor had been in the United States. From 2 to 6 March, the doctor had treated 70 patients at a clinic in Melbourne and two patients at an aged-care home. The clinic was closed, and his patients were told to self-isolate. People who had been on the same flights as the doctor were warned. The doctor believed he only had a mild cold and was fit to return to work.