http://healthimpactnews.com/2015/why-are...g-the-flu-shot/ http://healthimpactnews.com/2015/why-ar ... -flu-shot/ Health Impact News 2 Nov. 2015 http://healthimpactnews.com/2015/why-are...g-the-flu-shot/ healthimpactnews.com Source: healthimpactnews.com