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1. There are several examples in which very different vaccines have worked(1) similarly in a single population, and others(2) in which similar vaccines have behaved(1) very differently in different populations. The variation thus seems more(3) a function(4) of region than of(5) vaccine strain. [Lancct 1986 30: 499] 译:有几个例子,很不相同的疫苗在同一人群中的作用相似,而在另一些例子里,则同样疫苗在不同人群中的效果却大不一样。因此,这种变异看来更多是由于地区因素而非疫苗
1. There are several examples in which very different vaccines have worked (1) similarly in a single population, and others (2) in which similar vaccines have behaved (1) very differently in different populations. [Lancct 1986 30: 499] There are a few examples of very similar vaccines that work similarly within the same population, and in other cases, The same vaccine in different populations in the effect is very different. Therefore, this variation appears to be more due to regional factors than vaccines