Heard about contact tracing, but not sure what it is? During the pandemic, public health workers follow up with and interview people who have COVID-19 and their contacts. Contact tracing slows the spread of COVID-19. If you have been in close contact with a person who has COVID-19, a public health worker may call to let you know you’ve been exposed and ask you to stay at home and self-quarantine. Doing so keeps you, your family, and your community safe.