Todd Zywicki, a professor at George Mason University's Antonin Scalia Law School, is suing George Mason University over the university's COVID-19 vaccine mandate, arguing that he already contracted the novel coronavirus and believes he is protected due to natural immunity.

A coalition of big tech companies, including Microsoft is developing a COVID passport, with the expectation that a digital document linked to vaccination status will be required to travel and get access to basic services. The group is calling itself the Vaccination Credential Initiative (VCI), and includes Microsoft, Salesforce and Oracle.

The UK plans to roll out "immunity passports" to allow people who have contracted COVID-19 to leave the lockdown early. UK Health Secretary Matt Hancock said the certificates would be issued to people who have built up immunity to the coronavirus so they can return to "normal life."