I cannot understand why it is so difficult for the US to use vaccination passports, it will allow a safer and quicker reopening of the US border. [Reader Story]

✉️ [From Reader: TL]
Hi Sammual vaccination passports are the way forward, I do not know why America has not implemented vaccination passports, because the airlines have proven that this is a reliable method and that it works, if allows you to check whether someone has been vaccinated or not. So I cannot understand why it is so difficult for the US to use vaccination passports, it will allow a safer and quicker reopening of the US border.