Global travel is slowly opening and there are many questions about how travelers will provide their vaccination status. Sometimes referred to as Covid-19 passports, the Travel Certificate can be either a digital or physical health record. Organizations such as the International Air Transportation Association (IATA) are planning and developing a systems to streamline the process, however, none have been universally accepted.

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Risk Committee, GBTA https://www.gbta.org/blog/covid-19-travel-certificate-systems/