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There is little reason to feel "scared" by it. There seems little evidence that, outside Mexico, this flu variant is any "nastier" than the typical winter flu (and this last winter's was, in the UK at least, a pretty nasty one). It is being postulated in several sources that I've seen that the reason it's killing people in Mexico is that it's interacting with some other virus that's already endemic in the local population and that, by itself, it's not a particularly nasty virus.
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