Education Week (secondary source), Education Week, 'Which States Banned Mask Mandates in Schools, and Which Required Masks?' (Aug. 20, 2021; updated July 8, 2022; last data May 23, 2022) (Ex. ECO-B-117)
Ballotpedia (secondary source), Ballotpedia, 'State employee vaccine requirements during the coronavirus (COVID-19) pandemic, 2021-2023' (Dec. 31, 2021) (Ex. ECO-B-108)
Ballotpedia (secondary source), Ballotpedia, 'School responses to the coronavirus (COVID-19) pandemic during the 2021-2022 academic year' (Aug. 1, 2022) (Ex. ECO-B-107)
