New diseases. The human factor.
Department of Population and International Health, Harvard School of Public Health, Boston, Massachusetts 02115.
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D000401:Aircraft; D001519:Behavior; D003141:Communicable Diseases / Q000453:epidemiology* / Q000635:transmission; D003710:Demography; D006801:Humans; D011157:Population Dynamics; D012725:Sexual Behavior; D014195:Travel