Check the Centre for Disease Control site - probably one of the best :
http://wwwnc.cdc.gov/travel/destinations/laos.htm
http://wwwnc.cdc.gov/travel/destinations/cambodia.htm
http://wwwnc.cdc.gov/travel/destinations/thailand.htm
Obviously if you are going to come into any sort of "close physical contact" out there then make sure you take very good precautions and as a cert have Hep B vaccinations. One thing where prevention is very much better than treatment / attempted cure. Tetanus is a must. Cholera only if you're going
really rural and basic (it hurts like sh!t and only lasts for 3 months ... we used to pay a doctor to certify we'd had it in Africa - pretty much avoided with proper hygiene and water management - see below).
There's no vaccine available for Dengue Fever and no effective vaccine for Malaria either. You have to take preventive measures as best you can. But the Japanese Encephalitis ones - a series of 3 I think - are worth it.
I don't think any of the countries you are going to are Yellow Fever zones. However, the (alarmingly expensive) jab lasts 10 years (it's a live vaccine so has to be done at one of a number of approved centres) so if you're going to be travelling then it's quite good to have anyway. You must have it at least 10 days before entering a risk zone and can't have any other jabs for some time around it if I remember right. So if the urge takes you to go somewhere very exotic at short notice and your vaccination isn't current, forget it - you won't get entry to the relevant country without a certificate.
Most important thing is to follow the "staying healthy during your trip" advice on those pages .. it's all good advice. I lived for nearly 20 years on a continent with cholera, yellow fever, malaria etc and the best thing possible is to avoid getting insect bites in the first place and be extremely vigilant with your food / water. Take plenty of sanitizing wipes too and use them. They are really effective, easy to carry, cool you off and as a bonus can be used to wipe your bum properly if you get caught short miles from a loo. Nothing worse than trying to find a substitute for soggy bog roll and putting your hand on a vine snake by mistake
I'll probably get completely bashed by the "really green bregade" for this but ... you're only going out there for a short time and with little or no natural antibodies / resistance from childhood exposure to a number of things. So ..... I'd strongly suggest packing a large bottle of this :
http://www.amazon.co.uk/gp/product/...m=A3P5ROKL5A1OLE&pf_rd_r=1P5ZCB0BHEB3FJG0GRFA
... and also pre-treating your clothes with this, which is brilliant stuff. I use it whenever I go to the tropics .. it's extremely effective against insects and the worst I've some back with is flu caught on the blooming plane !
http://www.amazon.co.uk/Nomad-Bugpr...sr_1_1?s=sports&ie=UTF8&qid=1352842996&sr=1-1
I also take loads of extra out there in the suitcase and spray bedding/nets wherever possible. Have even used a combo of both the above to spray a strip along the bottom of sliding doors to patios / entrance to rooms where creepy crawlies come in and it zaps the lot. If there is a mosquito net then check it for holes and use it... and always keep doors shut at night if there's a light on in the room. My first exercise on checking in to a room in outlying areas in the tropics is to rid it of any obvious insects by getting them out of the door in daylight - or manually squishing them if they won't go or if it's dusk/dawn/night-time (especially odd-looking tiny hornets etc) and then treating the whole place as above. Not very ecologically sensitive, but you have to put your own health and safety first.
If you're a smoker - enjoy. Mosquitos hate cigarette smoke. They'll hide away until you stop then hone in on the CO2 trail from your breath, especially when the pattern resembles slumber or you are sat still and calm (watching TV for example). They are able to detect the patterns so if all else fails use a dozy mate as a "lure"
.
For a non-tropical veteran (and mostly for those too) - proper shoes, proper socks, long trousers anywhere off the beach (or if you wear shorts / short-sleeved shirts then for heavens' sake use Deet), long sleeves and proper technical fabrics to keep you cool in those conditions and avoid wanting to expose skin in the heat unnecessarily. Really, the poison toads etc are all easy enough to manage. Ribbit. It's the little things you hardly see which pose the biggest problem - and often unseen risk !
Then just pack plenty of Dioralyte, Imodium Plus, Water Purifying tablets and these if you hate the taste of treated water and you'll be as prepared as the next "explorer" :
http://www.gapyeartravelstore.com/W...n=GoogleBase&gclid=CPaR2Zz7zLMCFcrItAodFAsAUQ
Oh ... and start getting your jabs now. Some of them are multiple sessions (Rabies / Japanese Encephalitis) and sometimes you can't have jabs simultaneously so it takes a whole load of planning to get them all in. When you've decided what you want do some internet research and construct a timeline .. it can take a while to get an appointment for some jabs too !
