Being young and healthy is not always a defense against influenza. It's thought that the reason so many young and healthy people died in the Spanish Flu epidemic is because they hadn't been exposed to a milder form of it that made the rounds a generation prior, and so had no natural protection.
I am not too worried, mostly because there is precious little I can do about it. (Much like with Ebola or any of the other horrific viruses out there). If a '12 Monkeys' bug hits and things go to hell, then I will deal with it as best I can, provided I survive. If I don't, then I won't be around to worry about it anyway.
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