Originally Posted by
GUWonder
"Immunity passports" will continue to be what they are and have been for a long time: reliant upon fragmentary systems; not guaranteed to keep out all infections; and subject to circumvention by fraud at some level or another.
Whether an "immunity passport" is built on vaccinations or tests or both, this is already how it goes.
Which is fine - a system need not be perfect to still be useful.
I just got off a United flight where a deadheading pilot was telling a non-revving FA about how he and his entire tour group got COVID in Egypt and then decided to fly home to locations across the US because they didn't want to be sick in Egypt. This was before testing requirement for travel to the US. If the requirement was in place, they'd have to at least expend some effort to forge test results and defraud CBP, which might have served some deterrent value.