I'm a partner in https://www.shopgt.com/index.php/stmap_18bcre9.html drugtestingclinics.co.uk An allergic reaction is really just the body overreacting to what it thinks is a bacteria or virus. The body confuses the allergen (like pollen or peanuts) as a substance that will harm it, so it mounts an unnecessary full-blown immune system defense to get it out. This results in sneezing, wheezing, scratching and all kinds of unpleasant symptoms we associate with allergies.