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Groups can prevent burnout by working out a clear plan of the time and resources that will be necessary to achieve the group 's objectives and by evaluating if those goals are realistic . You can prevent mercury from building up in your body by spacing your fish meals out over time . " Nothing on earth can prevent me . This discrimination can prevent immigrants from acquiring suitable housing or can limit their choice of neighborhoods . Immunotherapy has been shown to prevent the development of new allergies and , in children , it can prevent the progression of the allergic disease from allergic rhinitis to asthma .