Result	Interpretation
Negative (<0.9 AU or equivalent)	No recent infection.
Equivocal (0.9-1.1 AU or equivalent)	Retesting may be needed. Could indicate early infection or a borderline result.
Positive (>1.1 AU or equivalent)	Recent or active CMV infection. Further testing (CMV IgG, PCR, viral culture) may be needed for confirmation.

IgM positive, IgG negative → Possible early infection or false-positive (confirm with PCR).
IgM positive, IgG positive → Recent reactivation or recent primary infection.
IgM negative, IgG positive → Past infection with immunity.