方法设P鄄转移因子口服液治疗组和常规治疗组，比较治疗后两组疗效。
Methods: All cases were randomized into therapeutic group of P-transfer factor and routine therapeutic group. The therapy curative effects of these two groups were compared.
目的观察p -转移因子口服液治疗反复呼吸道感染(RRTI)的临床疗效。
Objective to evaluate the clinical efficacy of P-transfer factor on recurrent respiratory infection (RRTI).
目的：评价P -转移因子口服液（P -TFO）防治小儿呼吸道感染的作用。
Purpose: Value P-TFO curative effect to prevent and cure infantile respiratory trace infection.
目的：评价P -转移因子口服液（P -TFO）防治小儿呼吸道感染的作用。
Purpose: Value P-TFO curative effect to prevent and cure infantile respiratory trace infection.
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