This paper looks at how, in recent years, every summer, the threat of West Nile (WN) virus has become the scourge of the
temperate regions of Europe and North America. It examines how the virus presents a threat to the human and animal populations and how
symptoms of WN viral infection range from mild fevers and aches to
encephalitis, which can be fatal. Outline Introduction and History Entomology Virology Vertebrate Ecology Symptoms of WN virus Diagnosis and Reporting Treatment and Prevention The Role of the CDC in West Nile Virus Conclusion