云南省勐腊县与老挝北部的丰沙里及勐赛两省接壤，虽均为亚热带雨林气候，但那里属高疟区。为修筑丰沙里至勐赛公路，多数来自云南省、少数来自湖南、四川及贵州省的筑路民工，均经血检证实疟原虫阴性、并口服防疟３号后，于１９９３年１０月底出境进入工地。工地周围多属... Mengla County, Yunnan Province and the northern part of Laos, Fengshali and Mengze provinces border, although both subtropical rain forest climate, but there is a high malaria area. To build Fengsali to Mengsai Highway, the majority of them came from Yunnan Province. A few migrant workers from Hunan, Sichuan and Guizhou provinces were confirmed negative for Plasmodium by blood tests and were allowed to exit at the end of October 1993 after oral administration of Malaria 3 Site. Around the site are mostly ...