The unidentified woman had sought treatment for runny nose and fever after returning home from a trip to South Korea from May 23-27, 2015.

The government health body said, "The Center for Health Protection received a report of a suspected case of Middle East Respiratory Syndrome from a private doctor involving a 22-year-old woman. She presented with a runny nose on June 7 and had a fever on June 9. She is in isolation at a hospital and in stable condition."
Healthcare workers wore protective gear as the area around the clinic was cordoned off.
Hong Kong had previously quarantined 19 people as a precautionary measure against MERS and had also isolated suspected cases which turned out to be false alarms.
Source-AFP