The present Antibody test is designed to complement the diagnostic test in the diagnosis of COVID-19 infections. Table below shows the clinical interpretation of all possible scenarios that can be encountered when testing a patient with both diagnostic and antibody tests.

Test results Clinical Significance
RT-qPCR IgM IgG
+ Patient may be in the window period of infection.
+ + Patient may be in the early stage of infection.
+ + + Patient in the active phase of infection.
+ + Patient may be in the late or recurrent stage of infection.
+ Patient may be in the early stage of infection. RT-qPCR results may be false negative.
+ Patient may have had a past infection, and has recovered.
+ + Patient may in the recovery stage of infection, or the RT-qPCR result may be false-negative.