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Originally Posted by You Need a Thneed
For some people, getting a flu shot might be beneficial. If you are someone who doesn't get sick very often, it's probably a waste of time.
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The flu virus changes every year. Whether or not you have gotten the flu or the flu vaccine before or not has no effect on this years strain. The flu is not like chicken pocks. Typically healthy people don't die from the flu (this strain maybe different) but you are still spreading the virus which could end up infecting someone young/old/sick and killing them.
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I'm wary of getting flu shots (for many people) because, it really just a vaccination for convenience. I won't say that vaccinations weaken our immune systems, but when our immune systems don't have to fight anything off, because we are vaccinated for everything, it's definitely not beneficial in the long run.
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The immune system doesn't work like this. Fighting off the flu doesn't make your immune system stronger, and getting the vaccine doesn't make your immune system weaker. It's like saying that wearing a condom weakens your immune system.
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Getting a vaccination for a disease that is more serious is a completely different matter. For most people, getting the flu isn't a serious disease.
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The flu directly and indirectly kills 30,000 people in the US each year and hospitalizes 200,000 each year. I would say that is serious enough to get a vaccine whose sides effects for the majority of people are a sore arm for a day.