1. U.S. Department of Health and Human Services. Fact Sheet: End of the COVID-19 Public Health Emergency. Available at: https://www.hhs.gov/about/news/2023/05/09/fact-sheet-end-of-the-covid-19-public-health-emergency.html.
2. How the CARES Act Affects COVID-19 Test Pricing;Adler,2020
3. Prices as signals of product quality;Wolinsky;Rev. Econ. Stud.,1983
4. Vaccination, politics and COVID-19 impacts;Albrecht;BMC Publ. Health,2022
5. Use of at-home COVID-19 tests;Rader;MMWR Morb. Mortal. Wkly. Rep.,2022