At least, that's what this site, put together by the U.S. State Department, suggests. It tells you which countries have travel warnings and why, and which places to avoid. Very thorough, very serious. Complete the checklist on the Travelers' Health page before you depart. Refer to Health Topics A to Z for answers you don't find in the checklist, or you can call the CDC hotline.
Nobody likes to get needles, but sometimes it's well worth a little discomfort.
Tell them your destination, and they'll tell you if you need a shot. The complexities of TV standards might leave some people dazed and confused, but not you. At least, not after you've spent some time browsing this specialized site. Broadcasting System Details lists standards for countries worldwide as well as technical specifications, while Standards Conversion helps you migrate between standards. To further impress your techie friends, there's a great section on Video Formats .