Repeated infections can disrupt work, study and family life long before there is a clear explanation. Common variable immune deficiency, or CVID, is one possible diagnosis. It requires specialist assessment; repeated colds alone do not establish it.
What does CVID mean?
CVID is an antibody deficiency with a variable pattern of symptoms. People may have repeated sinus, ear or lung infections, and some experience digestive, inflammatory or autoimmune problems. It may be diagnosed in childhood or adulthood.
The word “common” is part of the condition’s name; it does not mean that most people with frequent infections have CVID. See the American Academy of Allergy, Asthma & Immunology’s CVID guide for an introduction.
Diagnosis needs more than one result
Assessment considers the history of illness, levels of immunoglobulins and how effectively the body makes specific antibodies. Specialists also consider other reasons for low antibody levels. A single result on its own should not be used to label someone with CVID.
The Immune Deficiency Foundation’s CVID guide explains the diagnosis and continuing care. Ask which criteria apply in your case and whether further testing is needed before treatment begins.
Why immunoglobulin replacement may be used
Immunoglobulin replacement supplies antibodies to help protect against infections. It is an important treatment for many people with CVID, but it does not mean every symptom or complication disappears.
It can be given into a vein (IVIG) or under the skin (SCIG). The route, schedule, supervision and training should be chosen with the prescribing team. Do not change doses or infusion methods based on another person’s experience. IDF’s immunoglobulin replacement guide explains the options.
Follow-up goes beyond antibody levels
Some people need treatment for infections or additional problems involving the lungs, gut or immune regulation. Regular review helps the team respond to changes. Report persistent new symptoms, problems with treatment or difficulties obtaining prescribed supplies.
Ask what monitoring you need and how success will be judged. Fewer infections, recovery time and how you are managing everyday life are useful topics for that conversation. The plan should be specific to you, not copied from a social-media group.
Make treatment fit real life
Before starting or changing a treatment arrangement, discuss practical details:
- Access: where treatment happens, referral requirements and likely costs.
- Time: travel, time away from work and who can help with responsibilities.
- Training: who teaches you what to do and where written instructions are kept.
- Problems: whom to contact about side effects, equipment or a missed appointment.
- Continuity: what happens during travel, a move or an interruption in supply.
You do not have to solve these issues alone. Tell the team early if the arrangement is becoming unmanageable rather than quietly missing treatment.
Keep a clear illness plan
Ask your specialist which infection symptoms need same-day advice and when emergency assessment is needed. Seek emergency help for severe breathing difficulty, collapse or new confusion. Do not wait for a routine review if you are seriously unwell.
Vaccination decisions should be discussed with your immunology team, taking treatment into account. The IDF vaccine guide provides background. For the wider picture, read Understanding Immune Deficiencies and our shared caregiving plan.
General health information, not an individual diagnosis or treatment plan. Sources checked on 16 September 2026. International sources may describe services or medicines that differ from those available in South Africa. The featured image is illustrative.
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