For a social epidemic to occur, however, each person so affected must then influence his or her own acquaintances, who must in turn influence theirs, and so on; and just how many others pay attention to each of these people has little to do with the initial influential.
so affected该怎么样理解？这里是过去分词作定语修饰person吗？
是的，作定语。
For a social epidemic to occur, however, each person so affected must then influence his or her own acquaintances, who must in turn influence theirs.
【翻译】然而，对于一场社会性时尚病发生而言，每个受影响的人一定会干扰他或她的熟人，而这类熟人又一定会干扰他们的熟人。
