Final answer:
An emerging virus is one that has only recently infected large numbers of people. Examples include Ebola virus, West Nile virus, Zika virus, SARS, H1N1 influenza, swine and avian influenza, and HIV.
Step-by-step explanation:
An emerging virus is one that has only recently infected large numbers of people. Emerging infectious diseases are new infectious diseases that have no prior history in a human population. They may have appeared in a population for the first time or have rapidly increased in incidence or geographic range. Examples of emerging diseases include Ebola virus, West Nile virus, Zika virus, SARS, H1N1 influenza, swine and avian influenza, HIV, and many others.