I am working in a hydrogen peroxide plant and I am pretty aware of how dangerous this liquid is when taken internally in concentrated form. If you may take peroxide be sure it should not exceed the 3%purity that is commonly available in most drug stores. Peroxide if it is more than 5% purity and was not immediately diluted with water, may actually burn the outer lining tissues of your esophagus and stomach. Tehre are other ways to treat flu. try to visit this site it has a lot of info about treating flu other than ingesting peroxide.http://www.medicalhealthguide.com/category/infection/flu/flu2.php