Required vaccinations for Eastern Europe

As far as I know the recommended vaccinations are pretty much the same as in Western Europe. Depending where you are from obviously, you should have taken them when you were a child.

Having said that, it is always useful to discuss it with your local travel clinic.

Depending where you want to travel to you could check out the CDC destination page, which gives you a list of countries and possibly required vaccinations.

Though it may be more beneficial to give an indication of where exactly you're going to get a more definitive or streamed down list.