Anyone who visited a venue marked with a red dot must isolate for 14 days. People who have been to a location marked with an orange dot must isolate until they receive a negative test. Blue dots indicate that visitors should monitor their symptoms to ensure they are not infected, and green locations mean the venue no longer has a public health alert. Mr Tsang announced the website on Twitter and said the information was constantly updated using figures from Data NSW and NSW Health. 'Introducing Covid-19 Near Me (NSW) - a new tool to help you keep track of new case locations,' he wrote.