RESULTS:
A total of 310 staff were screened. 220(71%) were female, and the mean
age was 36±7.7 years old. 46(14.8%) staff reported having clinical
symptoms at some stage from the end of January 2020 to the time of this
surveillance. Number of staff who had a history of overseas travel,
close contact with confirmed COVID-19 patients, or had visited places
with identified COVID-19 clusters were 4(1.3%), 24(7.7%) and 24(7.7%)
respectively. There were 14 staff (4.5%) with positive tests positive,
2 for IgM, and 12 for IgG. All those with positive antibody were
subsequently tested negative with RT-PCR test. The history of having
clinical symptoms and exposure to COVID-19 cluster area were
independently associated with a positive IgG result.