Health Sector – UHC, National Health Policy, Family Planning, Health Insurance, etc.

West Nile Virus


Mains Paper 2: Governance | Issues relating to development & management of Social Sector/Services relating to Health, Education, Human Resources

From the UPSC perspective, the following things are important:

Prelims level: WNV & associated facts

Mains level: Preventing WNV spread in India


  • Centre has sent a special medical team to Malappuram district of Kerala from where a confirmed case of West Nile Virus (WNV) fever, a mosquito-borne disease was reported.

West Nile Virus

  • As per the World Health Organisation (WHO), the West Nile Virus (WNV) is a member of the flavivirus genus and belongs to the family Flaviviridae.
  • Birds are the natural hosts of this virus.
  • But it spreads to human by Culex mosquitoes.
  • Mosquitoes become infected when they feed on infected birds.
  • Once a person gets infected, the virus multiplies thereby causing illness.


  • Infection usually presents as a mild, non-fatal dengue like illness in humans.
  • The symptoms include fever, headache, tiredness, body aches, nausea, vomiting, occasionally with skin rash and swollen lymph glands.
  • A blood test report can only confirm if a person has been infected with it or not.
  • A very small proportion of infection transmission occurred through organ transplant, blood transfusions and breast milk.
  • Fortunately, there has been no human-to-human transmission of WNV through casual contact so far.


  • There is no definite treatment of the disease.
  • Prevention by the disease can be done by preventing mosquito bite, using repellents and wearing full sleeves.
  • It is diagnosed with the blood igm levels and Polymerase Chain Reaction (PCR).
  • There is no vaccination or specific treatment available for the virus but medical practitioners advice that it is important to recognize the disease and manage the symptoms.
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