The Tan Tock Seng Hospital cluster is the largest of nine active clusters in Singapore. - The Straits Times/ANN SINGAPORE, May 4 (The Straits Times/ANN): There were 17 new coronavirus cases confirmed by the Ministry of Health (MOH) as at Tuesday, taking Singapore's total to 61,252. Of these, five are from the community and none from migrant workers' dormitories. All of them were detected from MOH's proactive testing of patients, visitors and staff at Tan Tock Seng Hospital (TTSH) or their close contacts, and had already been placed on quarantine. In total, 40 cases are now linked to the TTSH cluster. It is the largest of nine active clusters in Singapore.