Exposure: All allergies are developed by an immune system reaction to the substance in question. Therefore, allergy requires previous exposure. If you are prone to allergy problems, you can develop an allergy to a particular substance at anytime after you become exposed to it. It sometimes take only a few exposures and other times it takes many exposures.
Answered 5/26/2014
5.9k views
4 doctors weighed in across 4 answers
A doctor has provided 1 answer
6 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question