Recurrent Infections in Pediatrics — 4yo Child | Pediatric Infectious | SMLE Q#15616
SMLE Question #15616
Pediatrics
Pediatric Infectious
Objective: OBJ-113
Last updated: February 2026
A 4-year-old boy is evaluated for recurrent infections. Over the past 2 years, he has had about 6 episodes of otitis media/sinusitis/pneumonia and several episodes of gastroenteritis, including 4 confirmed Giardia infections. His older brother died from sepsis at age 6. Physical examination shows no palpable cervical, axillary, or inguinal lymph nodes, and the tonsils are not visible. Which of the following is the most likely diagnosis?
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