Probably be more in the USA and parts of Europe

That's quite the difference from THB 4k. Japanese Encephalitis is also a rip in the UK. I remember getting vaccinated there - its a course of 2 and it was GBP 100 per shot pre-Covid. I always thought medicine was cheap in the UK? SAG

£250 approximately for the two jabs here in UK

Our government advises Dengue vaccinations for all of Thailand. But of course, they always will be on the safe side  Costs approx 5.200 THB 

Good point! I've heard that, but don't know if its true or not. SAG