Variable sensitivity
USMLE Step 1 Community
332 followers
1 Sep 2026
Recurrent respiratory infection +negligible vaccine response
Question:
A 28 year old patient presents with recurrent infections, specifically of the respiratory tract. He has grown up always suffering from numerous respiratory infections. Blood tests reveal a very low immunoglobulin levels, and upon pneumococcal antigen testing, it is revealed that the patient has negligible response to vaccines received in the past. What is the most likely diagnosis?
Options:
A)Selective IgA Deficiency
B)Follicular Bronchiectasis
C)Common Variable Immunodeficiency
D)Chronic Granulomatous Disease
E)Agammaglobulinemia
Recurrent respiratory infection +negligible vaccine response
Question:
A 28 year old patient presents with recurrent infections, specifically of the respiratory tract. He has grown up always suffering from numerous respiratory infections. Blood tests reveal a very low immunoglobulin levels, and upon pneumococcal antigen testing, it is revealed that the patient has negligible response to vaccines received in the past. What is the most likely diagnosis?
Options:
A)Selective IgA Deficiency
B)Follicular Bronchiectasis
C)Common Variable Immunodeficiency
D)Chronic Granulomatous Disease
E)Agammaglobulinemia