As pandemics plague 21st century, know about emerging viruses: MERS, SARS, Ebola, Marburg An infectious disease is called emerging when the virus is new on the global register, when its infection agent has changed to become more transmissible or more dangerous or when it is rapidly spreading through new regions.
As pandemics plague 21st century, know about emerging viruses: MERS, SARS, Ebola, Marburg
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