https://www.pollstar.com/article/phish-summerfest-other-artists-festivals-and-venues-enact-vaccination-or-negative-test-policies-148608

https://www.pollstar.com/article/aeg-presents-to-require-full-vaccination-at-venues-festivals-148605

https://www.pollstar.com/article/bonnaroo-vaccination-card-or-negative-test-now-required-148599

https://www.pollstar.com/article/live-nation-shares-covid-best-practices-artists-to-determine-concert-entry-requirements-148585