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DengiAll Vaccine Safety Concerns: 42 Severe Adverse Events in Brazil’s Butantan-DV Campaign, Risk of Antibody-Dependent Enhancement

Target:UPSC GS-IIIMPSCTeachingSSC GAPrelims HighMains HighStatic GK Link
15 Jun 2026
~2 min
Source: The Hindu
Key Data:June 8, 202642 severe adverse events2 deaths0.008%10,335 volunteers
Bodies:Instituto ButantanPanacea BiotecIndian Council of Medical Research (ICMR)U.S. National Institutes of Health (NIH)
Practice MCQs from today's news ▸
What This Article Covers

1.Brazil suspended its Butantan-DV dengue vaccination campaign on June 8, 2026, after 42 severe adverse events, including two deaths, raising alarms for India's similar DengiAll vaccine.

2.Both vaccines are tetravalent live-attenuated vaccines derived from U.S. NIH research, and the severe events may be linked to Antibody-Dependent Enhancement (ADE), a known risk with dengue vaccines.

3.The incident underscores a critical gap in Phase 3 trial data and the need for robust post-market surveillance, which will be a key examiner focus on vaccine regulation and public health safety.

The Big Picture
Prelims · HighMains · High

Brazil's suspension of its Butantan-DV vaccine after two deaths raises critical safety questions for India's similar DengiAll vaccine, highlighting the persistent risk of Antibody-Dependent Enhancement (ADE) in live-attenuated dengue vaccines. This news is crucial for understanding the complex immunology and stringent pharmacovigilance required for new vaccine rollouts.

Exam Lens

Quick Exam Facts From News

Vaccine Suspension DateJune 8, 2026
Severe Adverse Events (Brazil)42 cases
Fatalities Reported2 deaths
Vaccine Efficacy GapUnknown for DENV-3 & DENV-4
DengiAll Trial Enrollment10,335 volunteers

1-Minute Revision

  • Vaccine Suspension Date: June 8, 2026
  • Severe Adverse Events (Brazil): 42 cases
  • Target this Data: 42 severe adverse events in Brazil's campaign (0.008% of 500,000 vaccinated).
  • Target this Nodal Body: Indian Council of Medical Research (ICMR) collaborating on DengiAll Phase 3 trials.
  • Target this Scientific Concept: Antibody-Dependent Enhancement (ADE) as the potential cause of severe events.

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 Indian research body collaborated with Panacea Biotec for the Phase 3 clinical trials of the DengiAll vaccine?

2Statement-basedHard

Consider the following statements regarding the dengue vaccines mentioned in the news:

1. Both Butantan-DV and DengiAll are tetravalent live-attenuated vaccines derived from research at the U.S. National Institutes of Health (NIH).

2. The severe adverse events in Brazil are suspected to be caused by the phenomenon of Antibody-Dependent Enhancement (ADE).

3. The Phase 3 trial data for Butantan-DV showed high efficacy against all four dengue serotypes (DENV-1 to DENV-4).

Which of the statements given above is/are correct?

3Data-centricMedium

According to the news, how many healthy volunteers were enrolled in the Phase 3 clinical trial for India's DengiAll vaccine?

4Application/ImpactMedium

What is the primary public health concern highlighted by the adverse events linked to Brazil's Butantan-DV vaccine, which is also relevant for India's DengiAll?

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