https://www.scientificamerican.com/article/global-vaccine-equity-is-much-more-important-than-vaccine-passports/

As the U.S. and U.K. vaccinate their populations much faster than initially anticipated, two disparate concepts have been swirling online in English-language vaccine discourse: the moral need for global vaccine equity and the consumer-driven desire for vaccine passports.

I am a much bigger fan of creating global vaccine equity—by breaking intellectual property patents if necessary—to suppress the level of SARS-CoV-2, the virus that causes COVID-19, in as many humans as possible as quickly as possible across borders than I am a fan of creating vaccine passports that only allow those with the privilege of getting a vaccine to cross borders. Borders in some countries are currently being used to determine who does and doesn’t get a vaccine. It would be even more unethical to use those borders to bar the movement of people who have been denied vaccination.