The Instrumentalization of Science in Anti-Vaccine Groups on WhatsApp in Brazil
Bibliographic record
Abstract
Background: This study explores how scientific research is used by groups opposed to COVID-19 vaccines on WhatsApp in Brazil. While anti-vaccine narratives often present themselves as critical of science, their relationship with scientific literature is more complex and strategic. Analysis: Using thematic and content analyses, we examined how 39 scientific articles and preprints were cited across six WhatsApp groups. Although only one of the referenced studies explicitly opposed vaccination, the majority of the messages framed the cited research in ways that contradicted established scientific consensus. This suggests a pattern of instrumentalization, in which science is selectively and strategically misrepresented to support anti-vaccine beliefs and conspiracy theories. Conclusions and implications: These findings indicate that anti-vaccine groups may not reject science outright but rather distort it to legitimize their views. Understanding how scientific content is manipulated in digital spaces is critical for developing more effective science communication and counter-disinformation strategies.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.010 | 0.035 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.003 |
| Science and technology studies | 0.004 | 0.008 |
| Scholarly communication | 0.004 | 0.003 |
| Open science | 0.001 | 0.006 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".