Q. With reference to the West Nile Virus, consider the following statements;
1.The Aedes species of mosquito act as the principal vectors for transmission.
2.The disease is asymptomatic in 80% of the infected people.
Which of the statements given above is/are correct?
Answer: B
Notes:
Statement 1 is incorrect: Culex species of mosquitoes act as the principal vectors for transmission.
Statement 2 is correct: The disease is asymptomatic in 80% of the infected people. The rest develop what is called the West Nile fever. In these 20% cases, the symptoms include fever, headache, fatigue, body aches, nausea, rash and swollen glands. Severe infection can lead to encephalitis, meningitis, paralysis and even death.
Source: Indian Express

