Don't know: While not perfect, due to the nature of viruses the annual flu vaccine has more efficacy than many things done more commonly- vitamins, otc, etc.
Answered 10/13/2013
4.8k views
Many reasons: There are concerns with reactions as well as manufacturing practices. Furthermore a flu shot does not guarantee against developing the flu. It simply is the result of estimates about what may potentially be the most likely flu virus that season. Nevertheless, it is still vary safe and worth receiving in particularly high risk populations.
Answered 10/13/2013
4.8k views
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