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Vaccination certificate saved on the blockchain The confusion about pandemic rules is greater than ever before. In New York you are a long way further with a vaccination certificate. In the US state of New York, blockchain is being used to mobilize against the pandemic. New York Governor announced the introduction of the Excelsior Pass in the previous weeks. It's a blockchain-backed COVID-19 pass. Citizens across the state will be able to use it. Not just in New York; The int