well that's the thing. im going with my family to civilized places for a few weeks, but once they leave me behind, im looking at working on farms and venturing to more distant places. not sure how long im staying
Maybe you need a Thai resident health expert and ask what diseases are in their provinces, what are in the Thai distant places.
For example, my wife works with Shell Philippines Exploration and she steers a foundation in the remote province of Palawan. The corporation and the foundation have an anti-malaria project. In the regular civilized places, there is the common malaria disease brought by mosquitos, that with detection can be treated by their existing drugs easily. But they say if you are venturing deep into the forest to reach the remote tribes, the cerebral malaria strain there is different and instantly lethal... as a Manila based reporting team headed by Reyster Langit found out much later on whether they were uninformed or they disregarded the warnings. (they all died).
I remember many years ago I was working with our french equipment supplier and one of the french technicians who ventured into ivory coast in africa got hit by elephantiasis (?), strange ivory coast disease so they needed help from ivory coast experts who knew exactly what it was and what to do. He survived.