This will be my first time traveling out of the country and was wondering what vaccines id need. The sites I visited all had different answers ranging from just needed a flu shot to a couple others. What sites do you use for your information? Do you have to get vaccinated when you have a layover in another country? for instance I have a layover in Beijing, China for a couple hours on my way to Osaka, Japan. Should I be getting vaccines for China as well? Anyone know what vaccines I'd need or should get for Japan? How do I bring proof of being vaccinated? Thanks!