for my family - it has been pretty straight forward...get all the vaccinations that the HKG recommends...no questions asked. i don't know if that is smart or not, but our thinking is that it protects our daughters from whatever germs there are here in HK where we will be living permanently. i know there are many many views on vaccinations, just make sure you get the medical reports and not the anecdotal ones so that your reasons to have / not have the vaccinations are supported by medical doctors. at the end of the day it is very personal, for us, it was easy decision.