Positive reaction to allergen
![Positive reaction to allergen](/TransAdam/doc/graphics/images/en/8703.jpg)
Positive reaction to allergen
Allergic reaction is a sensitivity to a specific substance, called an allergen, that is contacted through the skin, inhaled into the lungs, swallowed or injected. The body's reaction to an allergen can be mild, such as a localized rash, or life-threatening, such as anaphylactic shock.
Content is best viewed in IE9 or above, Firefox and Google Chrome browser.