Вакцинация- для посещения концертовTicketmaster is working on a plan to verify the vaccination status of concertgoers once a coronavirus vaccine is available, Billboard reported Wednesday.https://thehill.com/homenews/news/525609-ticketmaster-exploring-verifying-fans-vaccine-status-before-issuing-concert- CommonPass для путешествий  https://www.weforum.org/platforms/covid-action-platform/projects/commonpass