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Nipah Virus Spillover Risk in Kerala Peaks April-September; 91% Fatality in 2018 Outbreak

Target:UPSC GS-IIIMPSCTeachingSSC GAPrelims HighMains High
13 Jun 2026
~2 min
Source: The Hindu
Key Data:April to September91%25%2.5 lakh
Bodies:WHOKerala Forest Research InstituteNational Institute of Virology (NIV)
Practice MCQs from today's news ▸
What This Article Covers

1.Nipah virus (NiV) spillover risk in Kerala is highest from April to September due to bat activity, fruit abundance, and viral shedding.

2.The Indian flying fox (Pteropus medius) is the natural reservoir, with ~25% sampled bats positive for NiV RNA in 2018, and roosts are often near human settlements.

3.Kerala's response includes a strengthened health system, a clinical algorithm for viral infections, community-based surveillance with 2.5 lakh volunteers, and a dedicated One Health Centre for Nipah Research and Resilience in Kozhikode.

The Big Picture
Prelims · HighMains · High

Kerala faces a recurring high-risk period for Nipah virus spillover from its bat reservoirs, with a documented 91% case fatality rate. The state's unique ecology and high human-wildlife interface create a 'zoonotic lab', demanding robust 'One Health' surveillance and swift public health containment strategies.

Exam Lens

Quick Exam Facts From News

Peak Spillover MonthsApril to September
2018 Outbreak CFR91% (18 lab-confirmed, 2 survivors)
Natural ReservoirIndian flying fox (Pteropus medius)
WHO Priority PathogenYes (High Threat Pathogen - HTP)
Community Surveillance VolunteersOver 2.5 lakh

1-Minute Revision

  • Peak Spillover Months: April to September
  • 2018 Outbreak CFR: 91% (18 lab-confirmed, 2 survivors)
  • Target this Data: Peak Nipah spillover risk in Kerala is from April to September.
  • Target this Nodal Body: The One Health Centre for Nipah Research and Resilience is located in Kozhikode.
  • Target this Legal Point: Nipah is classified by the WHO as a priority pathogen and a High Threat Pathogen (HTP).

Mastered this topic? Test your knowledge with a full MCQ quiz.

Practice exam-style questions, track your score, and strengthen your recall.

1Static LinkageEasy

Which organization has classified Nipah virus as a priority pathogen due to its high threat potential?

2Statement-basedHard

Consider the following statements regarding Nipah virus in Kerala:

1. The peak risk period for virus spillover from bats to humans is from October to March.

2. The Indian flying fox (Pteropus medius) has been identified as the natural reservoir of the virus.

3. In the 2018 outbreak, all identified cases were due to community transmission.

Which of the statements given above is/are correct?

3Data-centricMedium

What was the Case Fatality Rate (CFR) in Kerala's first Nipah virus outbreak in 2018?

4Application/ImpactMedium

What is the primary objective of Kerala's 'One Health' strategy involving over 2.5 lakh grassroots volunteers?

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