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What is contact tracing?

A woman answering the door wearing a face mask.

Some people are getting anxious for the country to reopen. They want to get back to work. They want to go out to restaurants and essentially return to their normal lives.

Health experts say that's all likely to be more successful if states can offer widespread testing for the coronavirus, followed up by contact tracing. But you may be wondering how contact tracing works.

A way to control an illness

Contact tracing aims to close the loop around an infected person and their contacts, preventing further spread of infection. It's been used successfully to control other illnesses like tuberculosis and SARS.

Contact tracing starts with the identification of someone who tests positive for COVID-19. That person is asked to recall their steps over the last few days. They'll be asked who they came into close contact with since they became sick. Contacts can include anyone who has been exposed to an ill person, including:

  • Family members.
  • Co-workers.
  • Friends.
  • Healthcare providers.

Everyone on the list of contacts will be notified of their contact status. They'll be told what it means and the steps that will be taken next. Those steps could include:

  • Quarantining all contacts.
  • Watching them for signs of illness.
  • Regularly testing them for infection.

What happens if you're identified as a contact?

If you're identified as a contact of someone with COVID-19, you may be asked to quarantine, most likely at home. You may also be asked to take your temperature regularly. And you should stay at least 6 feet from others at all times.

Learn more about COVID-19

Get more answers to your pandemic questions by visiting our Coronavirus health topic center.

Reviewed 3/29/2021

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