瘟疫是必然要发生的,就像死亡和交税一样。在上个世纪60年代和70年代间,成熟的现实主义取代了乐观主义,这种现实主义认识到人类与微生物之间的关系是既不可完全预测,也不会偏爱人类。在过去的几十年中,出现了一些重要的人类病毒(humanviruses),它们中的一些,如HIV,被证实是一种给人类带来痛苦的“时髦瘟疫”;另外一些,如F型肝炎病毒,像人类大军中的旅客一样,只静静地占据着一个 The plague is bound to happen, just as death and tax. Mature realism replaced optimism in the 1960s and 1970s, recognizing that human-microbe relationships are neither completely predictable nor favoritism. In the past few decades, a number of important human viruses have emerged, some of them, such as HIV, which proved to be a “chic plague” that causes human suffering; others, such as hepatitis F Viruses, like travelers in the human army, occupy only one quietly