West Nile virus: Media
viral disease
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The difference between bacteria and viruses
Knowing the difference isn't just a technical distinction—it can save lives.
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West Nile virus
Birds are the primary reservoirs of West Nile virus. The virus is transmitted to...
Encyclopædia Britannica, Inc.
West Nile virus
Colourized transmission electron micrograph (TEM) of West Nile virus.
P.E. Rollin, Centers for Disease Control and Prevention; photograph, Cynthia Goldsmith
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