The US has announced a ban on travellers from Europe - so what does that mean?

Hi! I'm John, an international aviation journalist. I've been travelling since I was eight weeks old, so it's no surprise I feels entirely at home in the air, on the rails and on the ground across the world, but I call a small village in central France home. On the road, I adore exploring Japan by rail, seeking out corners of Europe I haven't yet visited, and hunting down as-yet-unsampled kinds of dumpling. Say hello on Twitter.