Master tonic-though it could be argued that the treatment is worse than the malady...
equal parts (fresh rough chopped):
mix in appropriate airtight glass receptacle and cover with undistilled, unpasteurized apple cider vinegar. Let sit for 10 days, shaking once a day.
Strain through cheesecloth and keep liquid. Toss solids. Does not require refrigeration.
1 tbsp morning and night during cold season-you will not get a cold. Shortens the duration of the cold if you can't bear taking it as a preventative measure.
Oh, and if you can find a good PHO shop (Vietnamese noodle soup) it's great when you have a cold/flu as well.