Short answer · Medically reviewed summary · Last updated: 2026-05-08
Common Variable Immunodeficiency (CVID) is a primary immunodeficiency characterized by low levels of protective antibodies (immunoglobulins) and an inability to mount an effective immune response to infections. Diagnosis is typically confirmed through blood tests showing low IgG, IgA, and/or IgM levels combined with a poor response to vaccines, requiring consultation with an immunologist. What are the early signs of Common Variable Immunodeficiency? People with Common Variable Immunodeficiency often experience a pattern of recurrent, persistent, or unusually severe infections.
How do I know if I have Common Variable Immunodeficiency?
Could you have Common Variable Immunodeficiency? Early signs that prompted real patients to seek diagnosis, plus medically reviewed guidance.
Common Variable Immunodeficiency (CVID) is a primary immunodeficiency characterized by low levels of protective antibodies (immunoglobulins) and an inability to mount an effective immune response to infections. Diagnosis is typically confirmed through blood tests showing low IgG, IgA, and/or IgM levels combined with a poor response to vaccines, requiring consultation with an immunologist.
What are the early signs of Common Variable Immunodeficiency?
People with Common Variable Immunodeficiency often experience a pattern of recurrent, persistent, or unusually severe infections. Unlike a typical cold, these infections may linger for weeks, recur immediately after finishing antibiotics, or involve deep-seated areas like the lungs (pneumonia) or sinuses. Symptoms often emerge in adulthood, typically between ages 20 and 40, though onset can occur at any age.
How can I self-assess for Common Variable Immunodeficiency?
To identify if your health pattern warrants clinical investigation for Common Variable Immunodeficiency, consider tracking these indicators:
- Frequency: Do you experience more than 4 sinus infections or 2 pneumonias per year?
- Persistence: Do your infections fail to clear without multiple rounds of antibiotics?
- Systemic issues: Do you suffer from chronic unexplained diarrhea, malabsorption, or autoimmune conditions?
- Family history: Is there a known history of immune system disorders in your immediate family?
Which tests should I discuss with my physician?
If you suspect you have Common Variable Immunodeficiency, request a quantitative immunoglobulin panel (IgG, IgA, IgM). If these are low, your doctor should also check your "vaccine titers"—how your body responds to past immunizations like tetanus or pneumococcus. A failure to produce protective antibodies after vaccination is a hallmark diagnostic criterion for Common Variable Immunodeficiency.
What are the red flags requiring urgent care?
Seek immediate medical attention if you experience high fever, severe shortness of breath, confusion, or localized swelling that does not respond to standard treatment. These may indicate severe complications associated with Common Variable Immunodeficiency, such as significant lung scarring (bronchiectasis) or systemic infection.
Next steps
- Schedule an appointment with a clinical immunologist or rheumatologist.
- Keep a detailed log of all infections, antibiotic courses, and vaccinations for the past two years.
- Connect with the 22 members of the DiseaseMaps.org community who are navigating similar experiences.
- If dismissed, request a referral to an academic medical center or a primary immunodeficiency specialist.
Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Common Variable Immunodeficiency
- Orphanet: Common Variable Immunodeficiency (ORPHA:459)
- Immune Deficiency Foundation (IDF): Understanding CVID
- OMIM (Online Mendelian Inheritance in Man): CVID1 (#240500)
