One thing I've learned is that the moment I feel the onset of something unusual, I act. The sooner the better, no excuses no delays. Consequently the virus hasn't a chance to do any thing significant and my body does the rest . If I compromise I loose, and beer the weight of the malady . If it is something I ate , I immediately evacuate my stomach , then drink a shot of cider vinegar fallowed with a glass of water. I haven't had flu symptoms in years and can't remember having to go through all the pains others have apparently, but thats the advantage of dealing with it ASAP .