Case 666 is a 32 year-old female Singapore Citizen who has no travel history to affected countries or regions. She reported onset of symptoms on 24 March, and subsequent test results confirmed COVID-19 infection on 26 March morning. She is currently warded in an isolation room at Singapore General Hospital.

She is employed as an Associate Consultant at the National Skin Centre. Prior to hospital admission, she had gone to work. Contact tracing is ongoing.