OD ratio < 0.90 indicates no detectable Epstein-Barr Virus, IgM antibody.
OD ratio 0.91 - 1.09 are equivocal for Epstein-Barr Virus IgM antibody, Suggest a new specimen be collected and retested.
OD ratio > 1.10 is positive for Epstein-Barr Virus IgM antibody. A positive value indicates a primary or reactivated infection