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3. Kramer, S. (2022). More Americans say they are regularly wearing masks in stores and other businesses. Accessed February 3, https://www.pewresearch.org/fact-tank/2020/08/27/more-americans-say-they-are-regularly-wearing-masks-in-stores-and-other-businesses/.
4. Crabtree, S. (2022). Mask use far less common at private gatherings than in public. Gallup. Accessed January 30, https://news.gallup.com/poll/327533/mask-far-less-common-private-gatherings-public.aspx.
5. Understanding America study. University of Southern California Dornsife Center for Economic and Social Research (2020). Accessed June 30, 2021. https://covid19pulse.usc.edu/.