Social distancing, mask mandates, and proof of vaccination were not required to attend the event.
source https://cointelegraph.com/news/bitcoin-2021-attendees-positive-covid-19-tests-are-going-viral
Bitcoin 2021 attendees’ positive COVID-19 tests are going viral
source https://cointelegraph.com/news/bitcoin-2021-attendees-positive-covid-19-tests-are-going-viral
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