Generally speaking, if you are travelling to most of Europe, you probably wont require anything more than routine vaccinations (measles/mumps/rubella (MMR) vaccine, diphtheria/pertussis/tetanus (DPT) vaccine, poliovirus vaccine), and if you are inclined, Hep A and Hep B. Europe is a fairly innocuous continent in regard to specialized diseases - although this is always subject to change.
For Thailand, this is a different case. The Centre For Disease Control and Prevention recommends you get your Routines, Hep A, Hep B, Typhoid and Japanese Encephalitis. They also recommend Rabies vaccinations for certain types of travellers.
The best idea is to have a talk to your doctor about what vaccinations you require. It's VITAL however, that you get your shots at least 4-6 weeks before you travel.
Have a great trip!
Jesse - World Nomads Safety Hub about 8 years ago