A 1-Year-Old Baby Is Being Seen at the Clinic Because

A 1-year-old baby is being seen at the clinic because his parents are worried that he is always sick. The healthcare team is concerned that the baby may have a primary immunodeficiency (PI) . Which assessment data would support a diagnosis of PI?

A) Four or more new ear infections within 1 year and failure to gain weight normally
B) One bout of pneumonia in a year and failure to gain weight normally
C) One month on antibiotics with little effect and failure to gain weight normally
D) One serious sinus infection in a year and failure to gain weight normally