Paul,
As Jim pointed out this is not realistic to require the airlines to make sure each passenger is in compliance. There are way too many variables to even keep up with. Add to that things change constantly. So something could change after you make the booking. With the way things are you have the responsibility to look these things up and be familiar with them.
There is a publication called the TIM (Travel Info Manual) that is available to the airlines and travel agents, and actually I think you can find it online as well, but you have to subscribe, although most airline's websites will have a section somewhere that you can still look up the info. But, here's the thing. Let's say you are flying from the US to China. Are you a US citizen, or resident alien. What country is your passport from. What other documents do you have? What type of Visa do you have, if you have one at all?
The point is this, imagine the checkin process if the agents had to look this up for each and every passenger that flew. The same thing for vaccinations.
|