Uploaded September 2013 | Updated September 2026, 1 day ago

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People living in industrialized countries may be more likely to develop Alzheimer's because of greatly reduced contact with bacteria, viruses and other microorganisms— which can lead to problems with immune development and increased risk of dementia.

Source: Univ. of Cambridge

Read more: laboratoryequipment.com/videos/2013/09/better-hygiene-may-heighten-alzheimer%E2%80%99s-risk