虽然最有效的治疗方法是长期使用联合药物，但单剂量的治疗也能减少一半的感染几率。
Although the most effective treatment involves a combination of drugs taken over a long period, even a single dose of treatment can cut the transmission rate by half.
使用另一种药物nevirapine，即使单剂量就能将患病母亲传染婴儿的危险降低一半，更长的疗程可以将危险降低90%。
Even a single dose of another drug, nevirapine, halves the risk of an infected mother passing the virus to her baby. More extensive courses can reduce the risk by 90%.
一些专家指出，大概有一半的药物，目前其使用的剂量和服用的频率都是错误的。
Some experts suggestthatperhaps half of all medicines are taken at the wrong dose and frequency.
一些专家指出，大概有一半的药物，目前其使用的剂量和服用的频率都是错误的。
Some experts suggestthatperhaps half of all medicines are taken at the wrong dose and frequency.
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