Explanation:

Both statements are correct.
West Nile Virus (WNV)

• The West Nile Virus is a mosquito-borne, single-stranded RNA virus.
• According to the WHO, it is “a member of the flavivirus genus and belongs to the Japanese Encephalitis antigenic complex of the family Flaviviridae” and Culex species of mosquitoes act as the principal vectors for transmission.
• It is transmitted by infected mosquitoes between and among humans and animals, including birds, which are the reservoir host of the virus.
• Severe infection can lead to encephalitis, meningitis, paralysis, and even death.
• It was identified in birds in the Nile delta region in 1953.
• Before 1997, WNV was not considered pathogenic for birds, but then, a more virulent strain caused the death in Israel of different bird species, presenting signs of encephalitis and paralysis.
• To date, no human-to-human transmission of WNV through casual contact has been documented, says the WHO.

Hence option 4th is correct.