Correlate antibody titers with the stage of infection. What antibody titer excludes current infection?

What will be an ideal response?

Answer: Current infection: EBV-CA IgG: >1:60; EBV-CA IgM: >1:160; EBNA: not detected
Recent past infection: EBV-CA IgG: >1:160; EBV-CA IgM: not detected; EBNA: >1:10
Past infection: EBV-CA IgG: >1:40; EBV-CA IgM: not detected; EBNA: >1:40
A positive EBNA titer: Rules out current infection.