Table 1.

Events of interest related to COVID-19 vaccine confidence in Washington State.

	Event Description	Date Implemented
1	Institution of Washington (WA) statewide restrictions on openings and public gatherings	16 November 2020
2	Emergency Use Authorization for the BNT162b2 mRNA (Pfizer) COVID-19 vaccine by the U.S. Food and Drug Administration	11 December 2020
3	Initiation of Phase 1A Tier 1 COVID-19 vaccination in WA*, extending eligibility to: •High-risk workers in health care settings •High-risk first responders •Long-term care facility residents	14 December 2020
4	Initiation of Phase 1B Tier 1 COVID-19 vaccination in WA, extending eligibility to: •All people 65 years and older •People 50 years and older living in multigenerational households •Workers in childcare settings •Pre-K-12 educators and school staff	18 January 2021
5	First discovery of the SARS-CoV-2 variant B.1.1.7 in WA	23 January 2021

^*COVID-19 Vaccine Response Team, Meehan K, Hanewall B. COVID-19 Vaccine Prioritization Guidance and Allocation Framework.; 2021. https://www.doh.wa.gov/Portals/1/Documents/1600/coronavirus/820–112-VaccineAllocationPrioritization.pdf.