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Delayed Reaction:
refers to an anaphylactic reaction that follows contact with an allergen after a significant symptom-free period.
Dermatitis:
inflammation of the skin.
Derma:
the skin.
Desensitization:
the process by which an individual is made less reactive (sensitive) to a specific antigen (trigger); e.g. insect sting desensitization.
Diagnosis:
the art of distinguishing one disease from another.
Dosage:
the determination and regulation of the size, frequency and number of doses (quantity to be given at one time).
Double blind:
an experimental method by which both the subject and the experimenter are unaware of the nature of a given treatment; this design helps to avoid bias in experimental studies.
Dyspnea:
difficult or laboured breathing.
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