Auditing the impact of social media’s policy shift on anti-vaccine discourse: A large language model-driven empirical study
Fig 5
Time series of anti-vaccine tweet topics from Nov 16 to Nov 30.
Each color represents a different theme, and the dashed line marks the policy change date (Nov 23). The y-axis shows the percentage composition of topics, revealing how the relative prominence of health concerns, government conspiracies, and vaccine inefficacy narratives shifted following the policy change.