I've never taken flu shots and never needed to...the last time I had the flu was back in the early '90s, and I don't even remember the year, let alone when in that year, it happened. I haven't gotten anything worse than the common cold in the past ten years, and even that hasn't hit me in a long time.
But to be fair, the video did state that what happened to this woman was a total one-in-a-million chance, so as scary as this thing is, I don't think it should stop anyone who wants or needs help in combating the flu.