What's the worst thing about traveling?

Recently recovered from a nasty cold that started just a week before my trip.<br><br>On the flight, the dude next to me was coughing out a lung the entire flight. He even told me he was sick! <br><br>When I arrived back at my apartment, I caught a terrible stomach bug, which cost me a day of work to recover from.<br><br>What's the worst thing about traveling in your opinion?<br><br>EDIT: a lot of comments about sick people on flights. Maybe a sick/COVID policy that's enforced could help?