Best ways that I know of to avoid getting the flu and/or colds in the first place:
1) Carry your own pen and *never* use the store's pen to sign charge slips. Once I stopped using other people's pens, I rarely got viruses.
2) Keep small children and people who live or work with small children at least 3 feet away. Walking virus puddles.
3) Avoid shaking hands with politicians, ministers, and others who shake lots of (probably) unwashed hands.
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