I am planning on going to Cambodia in near future, I did all recommended vaccinations for Thailand, namely:
Above were free in UK from my GP while additional vaccinations are not... So I had figured to save some money to do them in Bangkok instead...
On the other hand after looking into statistics I realized that whole immunization thing is a it overreacted... for example there were very few deaths from malaria in 2016... and I wouldn't want to waste money on something I don't need... (and would prefer to spend them on drugs instead)
What immunizations are recommended or necessary for Cambodia?