What do you see as the limits or benefits of this solution?

Many are considering the introduction of a vaccination "passport", or a certificate that would allow people vaccinated against Covid-19 to travel safely and move more freely. The Israeli government, which has made great strides in its vaccination campaign, has adopted a so-called "green pass" whose holders can go to bars and restaurants without restriction. A similar solution is also being discussed in Switzerland, with the country being encouraged to sign on to the European Union's vaccine passport programme. What are your thoughts?