双侧唇裂畸形多较复杂，修复术后常出现上唇过紧，唇红过薄等继发畸形。

The deformity of the bilateral cleft lip is complicated. The routine procedure often results in secondary deformities, such as over-tight lip, and over-thin vermilion.

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PRRSV感染能降低猪体免疫力，常引起其他病原微生物的继发或并发感染，加重病情。

Infection of PRRSV can not only damage the immunity of the swine but also cause secondary affection or complicating disease involved other pathogenic microorganism, which exacerbates the situation.

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