As of May 2020, it remained unclear if any of these conditions have been met for COVID-19. On 24 April 2020, the World Health Organization (WHO) stated that “At this point in the pandemic, there is not enough evidence about the effectiveness of antibody-mediated immunity to guarantee the accuracy of an ’immunity passport’“. For example, research published in April 2021 shows that the Pfizer vaccine effect lasts for at least six months.
Many countries may increasingly consider the vaccination status of travelers when deciding to allow them entry or whether to require them to quarantine. “Some sort of vaccine certificate will be important” to reboot travel and tourism, according to Dr David Nabarro, special envoy on COVID-19 for the World Health Organization (WHO), in February 2021. Countries experimenting with or seriously considering COVID-19 immunity passports include Aruba, Britain, and Israel.
In some cases, an immunity passport will be combined with a vaccination certificat