此后在我国陆续发现外国人HIV带毒者约17名之多。
Since then, foreigners in China have found HIV virus are about as many as 17.
但是靠经验粗略估计，绵羊是带毒者、猪病毒扩增者，牛是病毒指示动物。
But the rule of thumb is. sheep are carriers, pigs are amplifiers, and cows are indicators.
很明显，这将使得更多的人由于物质的激励变成“毒品骡子”（即人体带毒者——译者注），冒着风险非法穿越边境。
This, obviously, creates a financial incentive for individuals to become drug mules and risk the hazardous journey across the border with illicit substances.
外界刺激、宿主免疫力的降低等因素都可以使宿主由潜伏感染状态发病，成为带毒者和传播源，因此，对潜伏感染建立及维持机理的研究就显得尤为重要。
Hosts can be diseased from latency condition by the decreasing of host's immunity and stimulation of condition, and so on , then become a carrier and infectious source.
外界刺激、宿主免疫力的降低等因素都可以使宿主由潜伏感染状态发病，成为带毒者和传播源，因此，对潜伏感染建立及维持机理的研究就显得尤为重要。
Hosts can be diseased from latency condition by the decreasing of host's immunity and stimulation of condition, and so on , then become a carrier and infectious source.
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