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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Thyroid conditions may make getting pregnant impossible.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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People about to have surgery must tell their health care providers about all supplements they take.