If a confirmed case is found in the place where I have been, will the Australian health code turn yellow immediately?

In general, if you have been to an epidemic area, or have had contact with a confirmed patient or a suspected case, it will turn into a yellow code, even red team.

If it is a yellow code caused by entering an epidemic area or contacting with a suspected case, it needs to be isolated according to the regulations, the source and daily health status should be declared in a small program, and the relevant staff should be registered, so that the yellow code will automatically become a green code if there is no abnormality in 14 days.

If the health code turns yellow for no reason, you can open the health code, find the "self-complaint" in the upper left corner, click the complaint, or uninstall and reinstall the applet to view it.