Shirley, if the vaccinations worked, then it would make no difference to a vaccinated person if there were non-vaccinated people around them because the vaccine would protect them from the disease. It would only be a problem if vaccination did not work. The c19 vaccine is said to be maybe ninety percent effective, which means that it is ten percent ineffective, hence, if you only allow vaccinated people into a ground/ plane or whatever, then ten percent of them could carry the disease because the vaccine was ineffective for them. Therefore allowing only vaccinated people into a ground/plane (for example) does not prevent the disease from that ground or plane, therefore, it is no different to allowing non-vaccinated people in. Anyway if the vaccine worked, then the ninety percent of vaccinated people for whom the vaccine was effective would be protected. It, therefore, makes no sense to only allow vaccinated people to circulate freely.......