Once a new pathogen is introduced in one individual, it may spread to the larger population.
一旦一种新的致病源传播给一个个体，它可能向更多的人传播。
In this article, the progress on studies of new pathogen of major diseases is reviewed. The new trends in the research and development of new drug are demonstrated.
文章综述了近年来重大疾病病因的研究进展，表明了新药研究开发的新趋势。
They've accomplished remarkable things: Within a few months of the April discovery that a new pathogen was spreading fast through humans, scientists had identified all of the virus's genes.
他们已经取得了非凡的成就：4月的“探索”频道中报道了一种新的病菌正在人类之间快速传播，几个月内科学家就已确认出所有病毒的基因。
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