Table. SARS-CoV-2 diagnosis in UKM employees (11 March – 17 April 2020).

Characteristic	Number of employees(% [95% CI])
Total tested Positive qRT-PCR	957 52 (5.4 [4.2; 7.1])
Symptoms at time of swab Cough Sore throat Cold Dyspnea Fever Fatigue Headache Muscle/joint pain Disturbance of smell/taste Diarrhea Contact with confirmed SARS-CoV-2 case – private – at work (patient/employee) Return from high-risk area Cluster* Positive qRT-PCR – 14 days’ quarantine completed – positive qRT-PCR >14 days after initial positive test	523 (54.6 [51.5; 57.8]) 345 (66.0 [61.8; 69.9]) 309 (59.1 [54.8; 63.2]) 276 (52.8 [48.5; 57.0]) 69 (13.2 [10.6; 16.4]) 78 (14.9 [12.1; 18.2]) 11 (2.1 [1.2; 3.7]) 191 (36.5 [32.5; 40.7]) 72 (13.8 [11.1; 17.0]) 23 (4.4 [2.9; 6.5]) 35 (6.7 [4.9; 9.2]) 227 (43.4 [39.3; 47.7]) 76 (33.5 [27.7; 39.9]) 151 (66.5 [60.2; 72.3]) 59 (11.3 [8.8; 14.3]) 9 (1.7 [0.9; 3.2]) 22 (4.2 [2.8; 6.3]) 20 (90.9 [72.2; 97.5]) 10 (45.5 [26.9; 65.3])
No symptoms at time of swab Contact with confirmed SARS-CoV-2 case – private – at work (patient/employee) Return from high-risk area Cluster* Positive qRT-PCR – 14 days’ quarantine completed – positive qRT-PCR >14 days after initial positive test	434 (45.4 [42.2; 48.5]) 304 (70.0 [65.6; 74.2]) 59 (19.4 [15.4; 24.2]) 245 (80.6 [75.8; 84.6]) 83 (19.1 [15.7; 23.1]) 26 (6.0 [4.1; 8.6]) 30 (6.9 [4.9; 9.7]) 23 (76.7 [59.1; 88.2]) 17 (56.7 [39.2; 72.6])

*Accumulation of two or more infections in immediate environment

qRT-PCR, Quantitative reverse-transcriptase polymerase chain reaction