Will this passport be efficacious, or is its purpose to get us accustomed to a "your papers please" way of life?

Allegedly, the combination of people with vaccinations and those recovered from infection have, or are, bringing about "herd immunity."  If so, what is the point of a passport?

There are credible reports that some who have been vaccinated have nevertheless come down with Covid, which raises doubt about the efficacy of the vaccine.  There are other reports that antibodies produced by the vaccines are not long lasting.

How recent must the Covid test be to make the passport valid.  A person could have a negative test and catch Covid on the way home.  If the passport relies on a negative test, the passport will have to expire after some designated period unless the passport is renewed with a new test.