The link between digital identification for human beings and vaccines as a delivery vehicle stems back to the "ID2020 Alliance"
ID2020.org
Their constituent members are listed on their website (collaboration between Big Pharma Gavi, Rockefeller Foundation, Accenture and the Bill/Melinda Gates Foundation, (it now lists Microsoft though)
Biometric Update - a website devoted to advocating & monitoring such technologies mentioned in September 2019 that the Alliance was strongly advocating & actively testing their vaccine-injected digital ID for humans
Biometric Update on Injectable ID Tech
Newsweek discussed Sweeden fielding a program that features injectable microchip for people so that both your digital identification AND your vaccine status is secure
Newsweek Article
Bloomberg article from 2020 talking about the rapid expansion of injectable biometric identification programs in multiple countries (Brazil, India, Kenya, and Nigeria are mentioned)
Bloomberg Article - Implantable ID
Food for thought - the movement is certainly real & gaining traction