Emerging-Re-emerging--Diseases-community-health-nursing-pptAn emerging infectious disease is a one that is caused by a newly discovered infectious agent or by a newly identified variant of a known pathogen, which has emerged and whose incidence in humans has increased during the last two decades and is threatening to increase in the near future.

 

A re-emerging infectious disease is a one which was previously controlled but once again has risen to be a significant health problem. This term also refers to that disease which was formerly confined to one geographic area, has now spread to other areas.
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