For not much more than a dollar a  bottle, the 3% hydrogen peroxide you keep around (or will after reading  this article) is a true medical home remedy, natural cure, and immunity  boosting alternative to seasonal flu vaccination, flu treatment, and  prevention. Did you know that throughout the world hydrogen peroxide is  used instead of chlorine as a safer and eco-friendly municipal water  purifier? Some use H2O2 in pools and spas. The science behind using  peroxide is actually pretty cool and experimentally verifiable.
Your  body makes hydrogen peroxide to fight infection which must be present  for our immune system to function correctly. White blood cells are known  as Leukocytes. 
A sub-class of Leukocytes called Neutrophils produce  hydrogen peroxide as the first line of defense against toxins,  parasites, bacteria, viruses and yeast.
Hydrogen Peroxide is described  as an effective anti-viral, antibacterial and anti-fungal, and can be  used for anthrax decontamination…which sort of shows how  it could probably do some sort of  good against a cold and flu virus, don’t you think?
 Bacteria, viruses,  and fungus (even those linked to tumors and arthritis)  have been known to be effectively dealt with by peroxide since the  early 1900′s. Europeans still use peroxide in many treatments.  
North America, however, seems to be a bit more controlled by  pharmaceutical interests and tend to have more faith in antibiotics than  simple cures. Peroxide works because it helps oxygenate  the blood and tissues. Here are a few ideas for you to use your own  bottle of peroxide around the house to boost your immunity and that of  your family.   
Gargle  with hydrogen peroxide, put drops in the ear and nose to end colds,  flu, chronic sinusitis (including polyps], and infections.
Tilt  your head back and spray into nostrils with a 50/50 mixture whenever you  have a cold, plugged sinus. It will bubble and help to kill the  bacteria. Hold for a few minutes then blow your nose into a tissue.
 Use it instead of mouthwash.
Let your toothbrushes soak in a cup of peroxide to keep them free of germs.
Industrial grade (35%)  peroxide can also be purchased. Use it in your bath and experience skin  healing and infections subsiding, and even internal inflammation. 
Brian Kenneth Clark