Dr. Ronan Glynn:

We all want vaccination to make a significant difference to our ability to travel. The position at present is that a very small proportion of our population is fully protected and very small proportion of populations internationally are fully protected. Even where they are fully protected we still do not have sufficient information on the issue of transmission. Even where they are fully protected from the variant we have here at present we do not yet have enough information, and internationally we are seeing increasing incidences of breakthrough infection with other variants in people who have been vaccinated. Furthermore, there is the issue of whether we could have a system that properly authenticates vaccine certificates. None of this is insurmountable. None of this is forever. The epidemiological situation throughout the EU is improving as we speak and the EU is looking at an EU-wide system of vaccination certification. We are all going in the right direction but it will take weeks to get there.