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Dengue Vaccine Development and Public Health Implementation Challenges in India

PYQs

4

Articles

1

Momentum

13

Phase IFoundation

Background

Overview

UPSC frequently examines advancements in biotechnology and their application in public health, along with the associated policy, governance, and socio-economic challenges in India. Dengue is a major public health concern, and vaccine development and rollout are critical for disease control.

Dengue, a mosquito-borne viral disease caused by four distinct serotypes, presents a significant public health challenge in India. The development of effective vaccines is complex due to the risk of antibody-dependent enhancement (ADE), and their successful implementation requires addressing scientific efficacy, regulatory hurdles, and socio-economic barriers to access.

Phase IIStatic core

Facts & tables

Key facts

Qdenga Vaccine Approval

India's first dengue vaccine, Qdenga (developed by Takeda), approved by the Central Drugs Standard Control Organisation (CDSCO), following WHO prequalification and licensing in over 40 countries.

Scientific Complexity of Dengue

Dengue has four antigenically distinct serotypes (DENV-1, DENV-2, DENV-3, DENV-4); a 'second infection' by a different serotype can lead to more severe disease through Antibody-Dependent Enhancement (ADE), necessitating broad immunity from vaccines.

Variable Efficacy Concerns

Qdenga's protection varies across serotypes, with stronger evidence against DENV-1 and DENV-2, but uncertainty regarding protection against DENV-3 and DENV-4 in dengue-naïve individuals, which is critical given increasing DENV-3 prevalence in India.

Public Health Implementation Hurdles

Challenges include ensuring completion of the two-dose regimen (three months apart) for mobile populations like migrant workers, and addressing the high cost to ensure equitable access for vulnerable groups in dense urban slums.

Reference table

Static syllabus anchors

TypeReference
Conceptual areaBiotechnology & Genetic Engineering
Conceptual areaMicrobiology & Epidemiology
Conceptual areaWelfare Schemes & Social Policies

Reference table

Institutions & roles

BodyRole
Central Drugs Standard Control Organisation (CDSCO)Approves vaccines
World Health Organization (WHO)Prequalifies vaccines
Phase IIIExam lens

Prelims angle

Overview

Prelims angle: Multi-statement analysis

Prelims angle: Conceptual understanding

Quick revision

  • Qdenga: India's first dengue vaccine, CDSCO approved.
  • Dengue: 4 serotypes, risk of Antibody-Dependent Enhancement (ADE).
  • Vaccine efficacy varies across serotypes (DENV-3/4 concern).
  • Implementation hurdles: 2-dose regimen for migrant workers, high cost.
  • Government role crucial for price negotiation and equitable access.

High-confidence PYQs

2023Terminology-based question, Factual recall

'Wolbachia method' is sometimes talked about with reference to which one of the following?

Science & TechnologyOpen question
2021Multi-statement analysis, Conceptual understanding

With reference to recent developments regarding ‘Recombinant Vector Vaccines’, consider the following statements: 1. Genetic engineering is applied in the d...

Science & TechnologyOpen question
2020Multi-statement analysis, Conceptual understanding

What is the importance of using Pneumococcal Conjugate Vaccines in India? 1. These vaccines are effective against pneumonia as well as meningitis and sepsis....

Science & TechnologyOpen question
2019Factual recall, Multi-statement analysis

Which one of the following statements is not correct?

Science & TechnologyOpen question

Topic timeline

Biotechnology & Genetic EngineeringMicrobiology & EpidemiologyWelfare Schemes & Social Policies
Prelims 2019· Factual recall, Multi-statement analysis

Which one of the following statements is not correct?

Open question
Prelims 2020· Multi-statement analysis, Conceptual understanding

What is the importance of using Pneumococcal Conjugate Vaccines in India? 1. These vaccines are effective against pneumonia as well as meningitis and sepsis....

Open question
Prelims 2021· Multi-statement analysis, Conceptual understanding

With reference to recent developments regarding ‘Recombinant Vector Vaccines’, consider the following statements: 1. Genetic engineering is applied in the d...

Open question
Prelims 2023· Terminology-based question, Factual recall

'Wolbachia method' is sometimes talked about with reference to which one of the following?

Open question

On guard: on India and the Qdenga dengue vaccine

25 Jul 2026 · The approval of Qdenga, India's first dengue vaccine, highlights the scientific complexities of vaccine development against multi-serotype diseases like dengue, particularly concerning Antibody-Dependent Enhancement (ADE). Its effective rollout faces significant public health implementation challenges, including variable efficacy across serotypes, ensuring complete dosing for mobile populations, and negotiating affordable pricing for equitable access.

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