LONDON, April 13, 2021 /PRNewswire/ -- As vaccination program rollouts gather momentum in certain countries, the resumption of regular international travel is no longer an abstract hope. The latest results from the Henley Passport Index — the original ranking of all the world's passports according to the number of destinations their holders can access without a prior visa — provide exclusive insight into what post-pandemic travel freedom might look like as countries around the world selectively begin to open their borders to...