Table 1.

Dates and CT values of positive RT- PCRs at detection and on return to work, including serology results

Sample	Days into outbreak at day of detection	Ct value at day of detection	Day of return-to-work	Ct value at day of return-to-work	Day of serology results	Serology results $ (Wantai total antibody score)
NURSE-001-S1	3	19	Day 23	Negative	Day 23	7.04
NURSE -002-S1	4	27	Day 23	31	Day 23	20.07
NURSE -003-S1	8	19	Day 23	33	Day 23	18.38
CAREGIVER-004-S1	7	21	–	–	–	–
CAREGIVER-005-S1*	8	NA	–	–	–	–
NURSE -006-S1	9	17	Day 26	32	NA	NA
NURSE -007-S2	11	31	Day 24	Negative	Day 24	20.58
NURSE -008-S1	12*	NA*	Day 29	29	Day 46	15.04
NURSE -009-S1#	10	34	Day 26	Negative	Day 26	19.15
NURSE -010-S1	15	20	Day 30	40	NA	NA
NURSE -011-S1	16	NA	Day 30	32	NA	NA

NA Not available= not applicable

*Not tested in hospital

^#Not sequenced due to high Ct value

^$Cut-offs for positivity were set at 1.1