Examlex
The clonal selection theory states that each antigen-reactive B cell or T cell has a cell surface receptor for a single antigen epitope.
White Blood Cells
Cells of the immune system involved in protecting the body against both infectious disease and foreign invaders.
Distressful Symptoms
Unpleasant physical or psychological signs that cause discomfort or suffering to an individual.
Constipation
A condition where an individual experiences difficulty in passing stools or has infrequent bowel movements.
Diarrhea
A condition characterized by the frequent passage of loose or watery stools.
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