Objective To realize the clinical features of primary immunodeficiency (PID) in children for early detection and diagnosis.
目的了解儿童原发性免疫缺陷病(PID)的临床特点，以助于早期识别和诊断。
OBJECTIVE: To summarize clinical features of primary immunodeficiency diseases (PID) in children.
目的：了解儿童原发性免疫缺陷病(PID)的临床特点。
OBJECTIVE: To summarize clinical features of primary immunodeficiency diseases (PID) in children.
目的：了解儿童原发性免疫缺陷病(PID)的临床特点。
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