Of these, six are airport staff employed at Terminals 1 and 3.
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They are a 27-year-old who works in a retail store at Terminal 3, a 29-year-old who works as an IT support engineer in Terminal 1, two Certis Cisco employees aged 28 and 67, and two Immigration and Checkpoints Authority officers aged 51 and 57.
The other seven are contacts of patients in the cluster.
They comprise two cleaners at Kopitiam Square Sengkang, another cleaner at Robinson 77 in the Central Business District, the principal of a language school, a retail staff at Ngee Ann City, an administrative worker in the Ministry of Manpower and a 91-year-old housewife.