Take a look at U.K.Gov.org? web site.
Lists countries and vaccinations required, for visiting them.
Some are needed several weeks, maybe 2 months, before travel.
So visit doctor or medical centre with list of vaccinations required. Probably have to order them!

Two years ago I went to Vietnam, Cambodia, Thailand and Malaysia and had the following vaccinations after speaking to doctor. Hepatitus A&B, Typhoid and also Tetanus /Diptheria/Polio. Last year went to Southern India and wandered and had a booster for the Hepatitus. You do not have to take Malaria treatments if you are travelling mainly fairly near the coastal regions. You do need to take insect repellants but used them only when mosquitos were about.  Both times I travelled rough not in anything which resembled high class travel. Only drink bottled water, don't go anywhere near ice cream, only have street food where the locals are eating, they know who's good!
There is a UK website that show's travellers where the risk of malaria is, but some of the travellers I have met say the side effects upset them. My recommendation is don't go to those areas and not in the monsoon season because of the increase in Mossies! If you need more info get in touch.