来自诸如蒙古、南非、肯尼亚、和玻利维亚的研究，妊娠晚期才开始保健，而且距离诊所远与先天梅毒有关。

Studies from places as diverse as Mongolia, South Africa, Kenya, and Bolivia associate congenital syphilis with care beginning late in pregnancy, as well as with distance from a clinic.

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中国的情况在其他地方也有。在撒哈拉沙漠以南的非洲国家，例如，38%的怀孕妇女被检查梅毒、研究者写道。

The situation in China is echoed elsewhere. In sub-Saharan Africa, for example, 38% of pregnant women are screened for syphilis, the investigators write.

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前言：目的：研究潜伏梅毒患者细胞免疫功能的变化。

Objective: To study the changes of cellular immunity in patients with latent syphilis.

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