The tendency to be allergic is often inherited. If one parent is allergic, children will have similar tendencies. If both parents are allergic, the likelihood of a child being allergic increases. A person can develop sensitivities to any substance if exposed to it in sufficient amounts over an adequate period of time. Some sensitivities take longer to manifest, others are rapid.
Most people think allergy symptoms are runny nose, itchy eyes, hives, sneezing etc.
This is correct but we find a lot of other symptoms too. The Listen System is the most recently developed computer aided Pre-Diagnostic Evaluation System. It combines current advances in biofeedback technology and the addition of computers. This is a newer version of the original system that was designed by Dr. Voll in Germany in the 1950's. The device outputs low energy electromagnetic frequencies and also measures those frequencies in the body.