The workflow of COVID-19 antibody surveillance test among
healthcare workers in SHC (Figure 1 and Figure 2)
Healthcare workers who fulfill the person under investigation (PUI)
criteria will be directed to occupational health and safety officers in
our hospital and further assessed by local infection disease specialist
following the PUI protocol of Malaysia.28 The
Malaysian Ministry of Health PUI criteria29 is acute
respiratory infection with or without fever and history of traveling to
foreign countries, close contact, or attended an event associated with
COVID-19 outbreak. Participants who were asymptomatic or with the onset
of clinical symptoms for at least seven days before the survey received
the antibody serology blood test. Other participants who are having
symptoms for less than seven days during the survey will be tested after
the symptoms had resolved seven days from the onset of illness. Staff
with a positive surveillance antibody serology test, either IgM or IgG,
will be referred to occupational health officer and later, the
infectious disease specialist for further assessment and RT-PCR test.