Uncovering the Time-Frequency Relationship Between Google Trends and COVID-19 Vaccination Metrics: A Hybrid ARDL-Wavelet Coherence Model for Prediction

The results show that Google Trends has good long-term prediction ability in the vaccine promotion stage, but its short-term prediction effect shows volatility with time and frequency. The ARDL-wavelet coherence analysis framework proposed in this paper provides a new research paradigm for evaluating the public's influence on vaccination. The research results emphasize the potential and importance of Google Trends in the construction of real-time public health response and early warning systems.