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Similar term(s): sensitisation, reverse tolerance.
In the context of allergies, sensitization is the process by which a person becomes, over time, increasingly allergic to a substance (sensitiser) through repeated exposure to that substance
Source: GreenFacts
The substance may cause a mild response on the first few exposures but, as the allergy develops, the response becomes worse with subsequent exposures. Eventually, even short exposures to low concentration can cause very severe reactions.
Source: based on New Mexico State University Glossary of Common Safety and
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