Originally Posted by
PaulFrank
I don't think vaccines work quite like that! They are not 100% effective and many people are unsuited to vaccination, for example those with certain underlying health conditions. A vaccine is useful, but it is no silver bullet and should be used as a part of a sensible and proportionate health strategy. It will be totally unethical to ban someone traveling because they hadn't been vaccinated, it also shows a rather simplistic understanding of the many issues.
Substitute yellow fever for Covid, and see how far that argument gets you when you try to enter Angola, Cameroon, Cote d'Ivoire and a number of other African countries without proof of vaccination.