“In May, the ACLU wrote: ‘Any immunity passport system endangers privacy rights by creating a new surveillance infrastructure to collect health data. It is one thing for an employee to voluntarily disclose their COVID-19 status to an employer on a one-off basis. But it is another for that information to be collected and retained, either by the government or by private companies offering immunity certifications.”
Of course, an “immunity certificate” makes the massive assumptions that 1) the vaccine would prevent asymptomatic infection 2) the vaccine would prevent transmission 3) that vaccine-induced immunity would be longer than 2 months (the duration of the prelicensure trials).