Case 166 is a 55 year-old female Singapore Citizen who had been in Malaysia on 3 March and 7 March. She is warded in an isolation room at NTFGH. She is a contact of Case 134, and is linked to the cluster involving the private dinner function at SAFRA Jurong.

She reported onset of symptoms on 4 March, and had sought treatment at a GP clinic on 4 March and 9 March. She presented at the emergency department of Ng Teng Fong General Hospital on 9 March. Subsequent test results confirmed COVID-19 infection on 10 March morning.

Prior to hospital admission, she had gone to work at Samwoh Corporation Pte Ltd (25E Sungei Kadut Street 1). She stays at Bukit Panjang Road.