You need to check with your GP practice and take their advice on what you need to protect yourself against in relation to your destination. I don't particularly like having to take injections either but I know that I'd hate catching Polio or Diptheria or Typhus even more. Diseases that we rarely see in the UK now haven't been eradicated - it's just that our immunisation practices have reduced the pool of infection to such an extent that contagion is rare and so even people who haven't been immunised are unlikely to come into contact with people who are carriers or infected. But the moment you are in an environment where that pool of infection is still large then your chances of catching something greatly increase.
Measles infections in children have increased in this country ever since the Triple vaccine scare because the level of immunity amongst the general population fell. For most kids Measles is something they shrug off and recover from, but for a minority it is still a killer. Group immunity doesn't need to fall by very much for it to have an impact on overall infection levels. More worrying is that babies who are born deaf and/or blind as a result of Rubella (German Measles) during the pregnancy became extremely rare after the vaccine to prevent it was discovered but the numbers of such babies has increased in recent years, not dramatically, but enough to make public health scientists worry that this is another possible consequence of parents avoiding getting their children vaccinated against it. Lower levels of kids being immunised against it means that more are likely to catch it and more pregnant women are likely to come into contact with infected kids.
So please, don't run the risk with your own health but just as importantly, done't run the risk with the health of others. If your GP recommends that you need certain vaccinations or boosters - please don't ignore that advice.
SM