I'd suggest asking your doctor to be sure, but when I went I was advised:
- Hep A & B
- Malaria tablets
- Rabies (only if you expect to be in close contact with animals)
There are a few considerations which depend on where you're going, what you're doing and how long you're there, so it's definitely a good idea to check with the doctor as well. 10 months ago
Hey - I lived in Cambodia for 10 months and this is what I did: I got all my normal shots updated and then typhoid and Japanese Encephalitis (mosquito borne disease) immunizations, which you need to start about 2 months before you go as it is in two parts and needs to be taken 1 months apart and 1 months before you go. It's not completely necessary, but it one of those things that gives you extra confidence if you're spending time in the provinces where there's not as much mosquito protection, especially if you're going during rainy season. Check out CDC for more info:
I didn't bother with Malaria. Malaria is treated by the same medicine that you use to prevent it and the medication isn't completely guaranteed to protect you. Each pill can cost about $3. Depending on how long you're gone and where you go, this can be costly and unnecessary. You need to start the medication a week before, take it every day you're there, and keep taking it 3 days or a week after you come back. In all my time there, I never met a single person who had a problem with malaria...no one even talks about it as a thing. My advice (but up to your discretion): don't bother. If you get malaria, it is treatable; just get to a hospital asap if you suspect. Be very careful to do your research on malaria medication; it's scary stuff that has a long history of causing mental and physical illnesses, if given the wrong kind. I believe the safe kind is called Malarone. Don't accept any medicine from a doctor or pharmacist in Cambodia without checking it first. Even locals don't trust doctors because of the bad history of bad medicine.
In the end, use fly nets at night, stand/sit in front of fans whenever you can, and wear mosquito repellent in the provinces or places in the city that have high mosquito population. Dengue fever is far more likely and common for you to get and there is no medication/immunization to prevent that. Have fun and stay safe! 27 days ago