Annex A Open Clusters Epidemiological investigations and contact tracing have uncovered links between cases. i. 4 of the confirmed cases (Cases 63160, 63253, 63294 and 63300) are linked to the Changi Prison Complex cluster, with the most recent cases (Case 63294 and 63300) linked to the cluster on 15 May. Case 63160 is a 39 year-old male China national who is employed by SATS Food Services Pte Ltd as a chef at Changi Prison Complex. He was confirmed to have COVID-19 infection on 13 May. Case 63253 is a close contact, and Cases 63294 and 63300 are household contacts of Case 63160. ii. 3 of the confirmed cases (Cases 63166, 63241 and 63280) are linked to the WOK HEY cluster, with the most recent case (Case 63280) linked to the cluster on 15 May. Case 63166 is a 22 year-old male Singaporean who works as a cook at WOK HEY (White Sands). He was confirmed to have COVID-19 infection on 13 May. Cases 63241 and 63280 are family members and household contacts of Case 63166. iii. 18 of the confirmed cases (Cases 63131, 63184, 63185, 63186, 63187, 63188, 63251, 63259, 63268, 63279, 63281, 63282, 63285, 63288, 63296, 63297, 63298 and 63325) are linked to the Learning Point cluster, with the most recent cases (Cases 63279, 63281 and 63285) linked to the cluster on 14 May; Cases 63282, 63288, 63296, 63297 and 63298 on 15 May; and Case 63325 on 16 May. Case 63131 is a 50 year-old female Singaporean who works as a tutor at Learning Point. She was confirmed to have COVID-19 infection on 12 May. Cases 63184, 63185, 63186, 63187, 63188, 63279, 63281, 63282 and 63285 are students at Learning Point. Cases 63251 and 63288 are household contacts of Case 63187; while Cases 63259 and 63268 are close contacts of Case 63186. Case 63296 is a family member and household contact of Case 63186. Case 63298 is a family member and household contact of Case 63184. Case 63325 is a family member and household contact of Case 63131. iv. 74 of the confirmed cases (Cases 62873, 62940, 62941, 62942, 62945, 62971, 62972, 62998, 63005, 63015, 63026, 63047, 63055, 63059, 63060, 63061, 63070, 63071, 63072, 63074, 63084, 63091, 63094, 63095, 63097, 63098, 63100, 63109, 63115, 63117, 63118, 63119, 63125, 63126, 63128, 63129, 63132, 63135, 63136, 63138, 63139, 63140, 63141, 63146, 63148, 63149, 63150, 63165, 63167, 63169, 63177, 63178, 63179, 63180, 63181, 63191, 63192, 63194, 63195, 63219, 63235, 63238, 63239, 63240, 63242, 63243, 63252, 63255, 63269, 63270, 63291, 63305, 63316 and 63324) are linked to the Changi Airport Terminal 3 cluster, with the most recent cases (Cases 63269, 63270, 63291 and 63316) linked to the cluster on 15 May; and Cases 63305 and 63324 on 16 May. Case 62873 is an 88 year-old male Singaporean who is employed by Ramky Cleantech Services Pte Ltd as a cleaner deployed at Changi Airport Terminal 3. He was confirmed to have COVID-19 infection on 5 May. All the cases work at or, had been to Changi Airport Terminal 1 or Terminal 3, or are household or workplace contacts of earlier cases. v. 5 of the confirmed cases (Cases 63096, 63122, 63221, 63256 and 63257) are linked to the Sengkang General Hospital cluster, with the most recent cases (Cases 63256 and 63257) linked to the cluster on 14 May. Case 63096 is a 33 year-old male Philippines national who works as an operating theatre nurse at Sengkang General Hospital. He was confirmed to have COVID-19 infection on 11 May. Cases 63122 and 63221 are household contacts of Case 63096. Cases 63256 and 63257 are close contacts of Case 63122. 1 vi. 46 of the confirmed cases (Cases 62541, 62557, 62561, 62567, 62568, 62573, 62574, 62582, 62599, 62615, 62635, 62643, 62648, 62680, 62687, 62697, 62713, 62714, 62715, 62717, 62721, 62722, 62723, 62724, 62731, 62732, 62754, 62781, 62784, 62786, 62787, 62790, 62791, 62794, 62795, 62801, 62803, 63807, 62808, 62816, 63007, 63008, 63009, 63104, 63168 and 63248) are linked to the Tan Tock Seng Hospital cluster, with the most recent case (Case 63248) linked to the cluster on 14 May. Case 62541 is a 46 year-old female who is a nurse at Tan Tock Seng Hospital, and was deployed at Ward 9D, a general ward. She was confirmed to have COVID-19 infection on 27 April. All other cases were detected from TTSH’s testing operations of staff, patients and visitors who had been to the hospital from 18 April to 28 April. vii. 3 of the confirmed cases (Cases 62939, 63083 and 63092) are linked to the Grab cluster, with the most recent case (Case 63092) linked to the cluster on 11 May. Case 62969 is a 38 year-old male Singaporean who works as a private hire car driver with Grab. He was confirmed to have COVID-19 infection on 8 May. Cases 63083 and 63092 are his household members. viii. 7 of the confirmed cases (Cases 62113, 62348, 62349, 62350, 62365, 62485 and 63078) are linked to the MT ALLI cluster, with the most recent case (Case 63078) linked to the cluster on 10 May. Case 62113 is a 39 year-old Indonesian national who is a sea crew on board bunker tanker MT ALLI, and was confirmed to have COVID-19 infection on 16 April. Cases 62348, 62349, 62350, 62365, 62485 and 63078 were his contacts onboard the vessel. ix. 8 of the confirmed cases (Cases 61822, 62684, 62691, 62824, 62877, 62906, 62938 and 62939) are linked to the Pasir Panjang Terminal cluster, with the most recent cases (Case 62938 and 62939) linked to the cluster on 7 May. Case 61822 is a 23 year-old male India national who works as a lashing specialist at Pasir Panjang Terminal. He was confirmed to have COVID-19 infection on 10 April. Cases 62684, 62691 and 62824 work at Pasir Panjang Terminal, and Cases 62877, 62906, 62938 and 62939 are household contacts of Case 62824. x. 11 of the confirmed cases (Cases 62517, 62571, 62572, 62576, 62583, 62594, 62595 62597, 62757, 62779 and 62780) are linked to the Immigration & Checkpoints Authority cluster, with the most recent cases (Cases 62779 and 62780) linked to the cluster on 2 May. Case 62517 is a 38 year-old male Singaporean, who works as an Immigration & Checkpoints Authority officer deployed at Changi Airport Terminal 1. He was confirmed to have COVID-19 infection on 27 April. Cases 62571, 62572, 62576, 62583, 62594, 62595, 62597, 62757, 62779 and 62780 are his family members. xi. 4 of the confirmed cases (Cases 62553, 62629, 62638 and 62760) are linked to the Tuas South CCF cluster, with the most recent case (Case 62760) linked to the cluster on 2 May. Case 62553 is a 39 year-old female Vietnam national who works as a cleaner deployed at a community care facility at Tuas South. She was confirmed to have COVID-19 infection on 28 April. Case 62638 was her workplace contact, and Cases 62629 and 62760 were household contacts. xii. 5 of the confirmed cases (Cases 61993, 62057, 62063, 62621 and 62622) are linked to the National University of Singapore cluster, with the most recent cases (Cases 62621 and 62622) linked to the cluster on 29 April. Case 61993 is a 34 year-old male Indian national who works as a senior research fellow at the National University of Singapore and was confirmed to have COVID-19 infection on 15 April. Case 62057 was his workplace close contact and Cases 62063, 62621 and 62622 were his household contacts. 2 xiii. 3 of the confirmed cases (Cases 62049, 62373 and 62524) are linked to the Case 62049 cluster, with the most recent case (Case 62524) linked to the cluster on 27 April. Case 62049 is a 79 year-old India national who arrived from India to visit his family member who is a Singapore Permanent Resident. He was confirmed to have COVID- 19 infection on 16 April. Cases 62373 and 62524 are his family members. xiv. 4 of the confirmed cases (Cases 61536, 62045, 62143 and 62234) are linked to the OM Universal Pte Ltd cluster, with the most recent case (Case 62234) linked to the cluster on 21 April. Case 62045 is a 41 year-old female Singapore Permanent Resident who works as an accountant at OM Universal Pte Ltd and was confirmed to have COVID-19 infection on 16 April. Cases 61536, 62143 and 62234 are her household contacts. xv. 7 of the confirmed cases are linked to the Westlite Woodlands Dormitory cluster, of whom 5 are re-infection cases. Case 62181 is a 35 year-old Bangladesh national who resides at Westlite Woodlands Dormitory and works as a construction supervisor at Sembcorp Marine Admiralty Yard. He was confirmed to have COVID-19 infection on 19 April. The other cases are his roommates at the dormitory. 3 Annex B1 Summary of Cases in the Community Number Case Confirmation of Date date Onset (years) Age Gender Nationality Exposure Visited Places Key Symptoms after (for Swab Onset/ cases) asymptomatic * 63269 15 May Asymptomatic 37 M Philippines Local linked Changi Airport Terminal 3 Cluster * 63270 15 May 13 May 36 M PR Local linked Changi Airport Terminal 3 Cluster * 63271 15 May 11 May 55 M SC Local unlinked * 63273 15 May 13 May 54 F Malaysia Local unlinked * 63274 15 May 12 May 55 M SC Local unlinked * 63275 15 May 13 May 52 M PR Local unlinked * 63276 15 May 13 May 40 M SC Local unlinked * 63277 15 May 13 May 18 M SC Local unlinked * 63278 15 May 11 May 69 M SC Local linked Contact of Case 63271 # 63279 14 May Asymptomatic 9 M SC Local linked Learning Point Cluster # 63280 15 May 10 May 26 F SC Local linked WOK HEY (White Sands) Cluster # 63281 15 May 15 May 8 M SC Local linked Learning Point Cluster # 63282 15 May 15 May 8 M PR Local linked Learning Point Cluster # 63285 14 May 12 May 8 F SC Local linked Learning Point Cluster * 63286 15 May 13 May 57 F Malaysia Local unlinked * 63287 15 May Asymptomatic 29 F Philippines Local unlinked 4 Number Case