Conclusion
COVID-19 antibody serology test helps to supplement the diagnosis of COVID-19 infection and assess the adaptive immunological response of healthcare workers to the infection. Although having a diagnostic test is prudent, our survey showed the utility of a proper history taking procedure as a first-line screening to risk stratify HCW for the serology tests, especially when resources are limited. The established relationship between clinical or epidemiological factors to the IgG status underlines the importance of HCW to observe the standard hygiene precaution and social distancing to avoid potential community or nosocomial transmission. Periodic antibody surveillance of HCW during or at the end of the pandemic with careful cost assessment may be beneficial.