Contact tracing

Last Updated: 26 Nov 2021 2:48pm

When a COVID-19 case occurs, Public Health identifies people who had contact with the case while they were infectious in the community. This is called contact tracing.

Contacts are identified by:

  • interviewing cases to find out who they live, work and socialise with
  • using Check in TAS data to identify people who may have visited an exposure site that was also visited by a case when they were infectious
  • working with workplaces and exposure sites to identify people who may have been exposed to a case while infectious.

Contacts are categorised as:

  • close
  • casual
  • low risk.

If you are a close or casual contact of a case, you will be contacted by Public Health and advised on quarantine and testing requirements. How long you need to quarantine is based on whether you are a close or casual contact, and whether you are vaccinated.

Whether you are a close, casual or low-risk contact depends on:

  • the amount of time you were exposed to the infectious case
  • how close you were to the case
  • whether you and the case were wearing masks
  • the vaccination status of the case
  • your vaccination status
  • the setting or location of the exposure