I say natural because the flu shot will not protect you from this flu virus. One can take tamiflu but it is only effective in the first twenty four to forty eight hours after onset of flu symptoms. Tamiflu is expensive at $88 for ten capsules and it may not even work against the mexican swine flu.
Some tips:
1) cough with your left hand as most people are righthanded and will shake hands, touch doorknobs,etc. with their right hand
2) use hand sanitizer
3) true flu has a high fever that pairs with nausea, vomiting, diarrhea, lethargy, loss of appetite,etc.
4) purchase a personal air purifier if you live in an urban center like New York City
5) eat lots of cayenne but save your echinachea for the initial onset of flu symptoms
6) beef up intake of vitamin C, olive leaf and oil of oregano if you are in an urban center, work in a hospital,etc.