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2. Centers for Disease Control and Prevention (2022, December 06). COVID-19 Data Tracker, Available online: https://covid.cdc.gov/covid-data-tracker/#datatracker-home.
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4. Pfizer (2022, December 06). BioNTech COVID-19 Vaccine COMIRNATY® Receives Full U.S. FDA Approval for Individuals 16 Years and Older. Available online: https://www.pfizer.com/news/press-release/press-release-detail/pfizer-biontech-covid-19-vaccine-comirnatyr-receives-full.
5. Johnson, J. (2022, December 06). Johnson & Johnson COVID-19 Vaccine Authorized by U.S. FDA For Emergency Use—First Single-Shot Vaccine in Fight Against Global Pandemic. Available online: https://www.jnj.com/media-center/press-releases/johnson-johnson-covid-19-vaccine-authorized-by-u-s-fda-for-emergency-usefirst-single-shot-vaccine-in-fight-against-global-pandemic#:~:text=NEW%20BRUNSWICK%2C%20N.J.%2C%20February%2027,of%20Johnson%20%26%20Johnson%2C%20to%20prevent.