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CMV IgG positive means you were infected with CMV at some point — likely years ago with no symptoms. The virus remains dormant in your body like all herpesviruses. You now have lifelong immunity against new primary CMV infection.
CMV IgG negative means you've never been infected with cytomegalovirus. Most adults worldwide have had CMV — it's a very common, usually asymptomatic herpesvirus. Being CMV-negative is important to know for pregnancy (to avoid primary infection) and organ transplantation.
If pregnant or planning pregnancy, be aware that primary CMV in pregnancy can affect the baby. Organ transplant recipients need CMV-negative donors if possible.
CMV IgG: {{value}} — negative (no prior exposure)You have no CMV antibodies, meaning you haven't been previously infected with cytomegalovirus.
Relevant information for pregnancy planning and transplant medicine. Practice good hygiene around young children who can shed CMV.
CMV IgG: {{value}} — negativeA borderline result may represent very early infection, waning immunity, or a borderline positive. IgM testing can help distinguish active from past infection.
Discuss with your doctor whether IgM testing or repeat a blood antibody test is warranted.
CMV IgG: {{value}} — borderline / low positiveCMV IgG positive means you were infected with CMV at some point — likely years ago with no symptoms. The virus remains dormant in your body like all herpesviruses. You now have lifelong immunity against new primary CMV infection.
For most people this is a normal finding with no clinical implications. For immunocompromised patients (transplant, HIV), monitoring for CMV reactivation is important.
CMV IgG: {{value}} — positive (past infection, now immune)Your CMV IgG levels reflect established immunity from a past infection.
No action needed for healthy individuals.
CMV IgG: {{value}} — positive (established immunity)Higher CMV IgG levels can suggest recent primary infection, reactivation of dormant virus (especially in stress or immunosuppression), or simply a strong historical immune response.
Check IgM levels to see if there's active infection. In immunocompromised patients, monitor closely.
CMV IgG: {{value}} — elevated — possible recent or reactivated infectionHigh CMV IgG simply reflects a strong immune memory of a past CMV infection. In healthy individuals, this is not a concern.
For immunocompromised patients, discuss with your specialist about CMV monitoring.
CMV IgG: {{value}} — high positiveVery high CMV IgG, particularly with rising titers, can indicate CMV reactivation — which is clinically significant in immunocompromised patients (transplant recipients, HIV patients, those on immunosuppressants).
In immunocompromised patients: urgent specialist review and CMV PCR/viral load testing. In healthy individuals: less concerning but worth checking IgM.
CMV IgG: {{value}} — very high — possible active reactivation in vulnerable patientsUpload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.