Officials have identified a positive coronavirus (COVID-19) patient who went to three businesses in Northern Michigan over the weekend and might have infected other people. They released the locations, dates and times of the possible exposure. Contact tracing happens when someone tests positive for the virus, and contact tracers track down close contacts that person had and places they visited during the time they might have been infections. READ: Contact tracers considered key to coronavirus battle, but what are they? Contact tracers will never ask you for your social security number, drivers license or credit card information.