Answer:
MedlinePlus. National Library of Medicine. ...
Centers for Medicare & Medicaid Services. 800-633-4227 (toll-free) ...
Centers for Disease Control and Prevention (CDC) 800-232-4636 (toll-free) ...
healthfinder.gov. www.healthfinder.gov.
Explanation:
overcrowding, destitution, crime, pollution, and political turmoil
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