Recurrent Sinopulmonary Infection

What does recurrent infection actually mean?

The pattern of repeated infections matters. Four or more sinus infections in a year, two or more pneumonias in any timeframe, or chronic bronchitis requiring multiple antibiotic courses are not normal and should prompt evaluation. So should bronchiectasis identified on imaging in someone with no obvious risk factor.

Many patients with recurrent infections have spent years cycling through urgent care, primary care, and specialist visits without anyone connecting the pattern. The underlying cause may be a primary immunodeficiency such as CVID or Specific Antibody Deficiency, an IgG subclass deficiency, a complement deficiency, or a structural problem in the airways or sinuses. A complete immune evaluation is the path to identifying which.

When to consider evaluation

Four or more sinus or ear infections per year requiring antibiotics
Two or more pneumonias in any time period
Chronic productive cough or chronic bronchitis
Bronchiectasis identified on imaging
Multiple courses of antibiotics that do not seem to fully resolve infection
Recurrent skin infections, abscesses, or unusual organisms

The complete immune workup

Standard evaluation at Optimed Immunology includes quantitative immunoglobulins (IgG, IgA, IgM, IgE), IgG subclasses, specific antibody response testing to vaccine antigens (with pre- and post-vaccination titers when indicated), lymphocyte subset analysis, and complement studies (CH50, C3, C4). HIV screening is performed when appropriate. Secondary causes are considered and addressed.

Coordination with pulmonology and ENT is common — to evaluate structural contributors and to review prior imaging. The goal is a definitive answer about why infections keep recurring, not another round of antibiotics for the latest one.

Treatment options

Treatment is directed by findings. For patients with primary antibody deficiency, immunoglobulin replacement therapy substantially reduces infection frequency for many patients. For others, prophylactic antibiotics during high-risk seasons may be appropriate. Vaccination optimization and management of contributing structural disease (such as chronic sinusitis or bronchiectasis) are part of comprehensive care.

Many patients describe substantial improvement in infection frequency, energy levels, and quality of life within months of starting the right treatment.

What to expect at your visit

The first visit lasts 45 to 60 minutes and focuses on building a complete picture of your infection history. Bring or send any prior records — past lab work, imaging, hospital discharge summaries, prior immunology workups. Dr. McNeil reviews these in detail and discusses which additional tests are needed and why. A clear plan is provided in writing.

Decision support

Choosing between IV, subcutaneous, and facilitated-subcutaneous immunoglobulin? See the full comparison: IVIG vs SCIG vs fSCIG →

Treatment pathway at Optimed Immunology

Every patient’s situation is different, but the decision logic for recurrent sinopulmonary infection generally follows these steps. This is not a script — it is a structure that gets adapted to each patient’s history, findings, and goals.

Confirm the pattern	Structured infection history (frequency, severity, documented confirmation, antibiotic courses, hospitalizations), imaging review, and exclusion of anatomic causes.
Rule out look-alikes	Anatomic sinus disease, allergic disease driving the appearance of infection, bronchiectasis without immunodeficiency, immotile cilia syndromes, and reflux disease.
First-line / supportive	Optimize sinus and pulmonary care, ENT coordination when appropriate, allergy management, smoking cessation where relevant, and judicious antibiotic use.
Advanced testing & treatment	Immune workup including quantitative immunoglobulins, IgG subclasses, lymphocyte subsets, and vaccine response testing. When an immune cause is confirmed, treatment is condition-specific.
How Dr. McNeil chooses	The path depends on what the workup finds. Many patients have allergic disease, anatomic disease, or both — not immunodeficiency. The goal is to identify the right cause and avoid unnecessary therapy.
Monitoring & follow-up	Infection frequency, response to interventions, and re-assessment when the picture is not clarified by initial workup.
Insurance & prior authorization	Any specialty therapy that emerges from the workup is handled with in-house prior authorization support.

Medically reviewed

Donald L. McNeil, MD · Board Certified in Allergy & Immunology and Internal Medicine

Last reviewed: November 2025 · Sources: AAAAI · ACAAI · Immune Deficiency Foundation · FDA prescribing information · relevant clinical guidelines

This page is provided for educational purposes and does not substitute for clinical judgment or direct medical advice. Treatment decisions are individualized based on your full history, examination, and laboratory findings. If you have an emergency, call 911.

Recurrent Sinopulmonary Infection.