You can count yourself Lucky .. 20 years is a long time. A friend of mine was unlucky and caught a resistant strain of malaria after just a week in Malaysia. Spent 6 month in the hospital and are still taking meds.
So better be safe Guys..
Here are some of the not so pleasant stuff you can catch. The reason why most get a vacination for these diseases are that there are no cure for any of them except Typhoid.
COPY PASTE FROM CDC (center for diseese control)
Hepatitis AÂ
CDC recommends this vaccine because you can get hepatitis A through contaminated food or water in Cambodia, regardless of where you are eating or staying.
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You can get typhoid through contaminated food or water in Cambodia. CDC recommends this vaccine for most travelers, especially if you are staying with friends or relatives, visiting smaller cities or rural areas, or if you are an adventurous eater.
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Hepatitis BÂ
You can get hepatitis B through sexual contact, contaminated needles, and blood products, so CDC recommends this vaccine if you might have sex with a new partner, get a tattoo or piercing, or have any medical procedures.
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Japanese EncephalitisÂ
You may need this vaccine if your trip will last more than a month, depending on where you are going in Cambodia and what time of year you are traveling. You should also consider this vaccine if you plan to visit rural areas in Cambodia or will be spending a lot of time outdoors, even for trips shorter than a month. Your doctor can help you decide if this vaccine is right for you based on your travel plans. See more in-depth information on Japanese encephalitis in Cambodia.
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When traveling in Cambodia, you should avoid mosquito bites to prevent malaria. You may need to take prescription medicine before, during, and after your trip to prevent malaria, depending on your travel plans, such as where you are going, when you are traveling, and if you are spending a lot of time outdoors or sleeping outside. Talk to your doctor about how you can prevent malaria while traveling.
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Rabies can be found in dogs, bats, and other mammals in Cambodia, so CDC recommends this vaccine for the following groups:
•Travelers involved in outdoor and other activities (such as camping, hiking, biking, adventure travel, and caving) that put them at risk for animal bites.
•People who will be working with or around animals (such as veterinarians, wildlife professionals, and researchers).
•People who are taking long trips or moving to Cambodia
•Children, because they tend to play with animals, might not report bites, and are more likely to have animal bites on their head and neck.