Contact tracing is retracing the patient’s footsteps, zeroing in on who else might have been exposed and joining the dots on Australia’s outbreak. It is now becoming one of the most expansive webs of health data the nation has ever built. Article explains how cases unfold, how contacts are traced and what other countries are doing.

https://www.brisbanetimes.com.au/national/contact-tracing-how-disease-detectives-are-closing-in-on-covid-19-in-australia-20200410-p54itv.html