The Washington Post reports that the Biden administration is working on developing a standardized “vaccine passport” so individuals can prove that they have been properly vaccinated against COVID-19. Many initiatives are already underway, including by the Vaccine Credential Initiative, a newly created coalition of healthcare and technology organizations aiming to publish a freely available, openly licensed implementation guides for vaccination credentials this month. Other groups, like the American Civil Liberties Union (ACLU), are pushing back, warning that a passport system could create inequities. The ACLU suggest that if a passport program is created, it cannot be exclusively digital, should be decentralized and open source. The ACLU also recommends that the program should not allow for tracking or the creation of a new database to prevent privacy concerns.