1. https://covid.cdc.gov/covid-data-tracker/#vaccination-states-jurisdictions.
2. https://www.cdc.gov/respiratory-viruses/data-research/dashboard/vaccination-trends-adults.html.
3. SteelFisher, G. K., et al. (2023). Divergent attitudes toward COVID-19 vaccine vs Influenza Vaccine. JAMA Network Open, 6(12), e2349881.
4. Kahneman, D. (2011). Thinking, fast and slow. Farrar, Straus and Giroux.
5. https://www.cdc.gov/media/releases/2024/p0505-smokers-tips.html.