Description

When testing for Epstein-Barr Virus (EBV), IgG antibodies indicate a past infection with EBV, while IgM antibodies indicate a current or recent primary infection with the virus; essentially, IgG shows if you've been exposed to EBV at some point, while IgM suggests a recent active infection. 

Key points about EBV IgG and IgM:

IgG (Immunoglobulin G):

• Detects antibodies produced later in an EBV infection, persisting for a long time, indicating past exposure to the virus. 
• A positive IgG result alone usually means a past EBV infection, not an active one. 

IgM (Immunoglobulin M):

• Detects antibodies produced early in an EBV infection, suggesting a recent primary infection. 
• A positive IgM result, especially when combined with a negative EBNA (Epstein-Barr Nuclear Antigen) IgG, indicates an active EBV infection.

Fasting not required.