AFAIK... Pfizer claims only that the vaccine means people do not become ill from Covid - ie do not experience symptoms like difficulty breathing. I haven't seen any claims about whether a person remains significantly infectious or not. If such a person were to remain highly infectious but does not exhibit illness, we still have a potential problem with cross-border flying (ie PCR test on arrival still needed) until large chunks of the vulnerable in society have been vaccinated
Does anyone have good quality info around this with reputable sources ?