The pathological study showed that the primary infection was a kind of reaction to foreign body, while that of the re - infection was allergic.

病理学研究显示，初次感染以异物反应为特征，再次感染以过敏反应为特征。

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The pathological study showed that the primary infection was a kind of reaction to foreign body, while that of the re - infection was allergic.

病理学研究显示，初次感染以异物反应为特征，再次感染以过敏反应为特征。

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