Two COVID-19 cases with no linked source in Sydney's west near Penrith has concerned health officials. Crystal WuDigital Reporter July 15, 2021 - 12:05PM NSW Chief Health Officer Dr Kerry Chant says a new case in Emu Plains, a suburb in Sydney's west, is of particular concern. Dr Chant says the case has not been linked to the previous cluster, prompting calls for further testing. "The case is unlinked and under investigation there was also a previous case in Emu Plains in the last week with no known source," she told reporters on Thursday. "So this is of concern to us. We are asking anyone in Emu Plains to get tested, even for the most minor of symptoms."