Multiple chemical sensitivity (MCS), also knownas "20th Century Syndrome", "Environmental illness", "Sick Building Syndrome", Idiopathic Environmental Intolerance (IEI), can be defined as a "chronic, recurring disease caused by a person's inability to tolerate an environmental chemical or class of foreign chemicals" according to the NIH National Institute of Environmental Health Sciences web site.


Multiple chemical sensitivity (MCS), also known as "20th Century Syndrome", ...
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Multiple Chemical Sensitivity: Fact or Fiction?
... What is multiple chemical sensitivity? Multiple chemical sensitivity (MCS) is the name given by some to a condition in which various symptoms reportedly appear after a person has been exposed to any o...
Source: Cleveland Clinic