Review on Emerging and Reemerging Infectious Diseases and Their Origins

Emerging infectious diseases are diseases with an incidence rate that increased in the past 20 years and could increase in the near future. There are two categories of infectious diseases namely; emerging and reemerging infectious diseases. As such, are diseases that are recognized in the human host for the first time and diseases that historically have infected humans, but continue to appear in new locations or drug-resistant forms. Certain factors resulted in the emergence of emerging and reemerging infectious diseases, which include; ecological factors, human demographic changes and behaviour; travel and commerce; as well as; technology and industry. Moreover, they are also widespread in the universe despite the awareness of preventive measures across the globe.