Besides the covid vaccination requirements if you wish to enter with little or no quarantine.
If you happen to be from or have travelled through a country that has risk of Yellow Fever (list here:
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0a30d ) you MUST have proof of being vaccinated for it before being allowed into the country.
Other than that there are no requirements to have any vaccinations to be allowed into the country.
If you are visiting one of the many tourists spots like Bangkok, Phuket, Chiang Mai etc there isn’t really a need for any. You should probably check you are up to date for Tetanus and Hep A/B but that is general vaccine stuff not specific to Thailand.
If you are planning to visit some of the more remote areas or jungles of Thailand then you may want to research further as to what to get.
Dengue fever & Chikungunya (similar symptoms to Dengue) Is prevalent in many areas of Thailand, but there isn’t really a vaccine for it, so just make sure you use lots of mosquito spray to ward them off. Sunrise and Sunset is when the mosquitos are most active.
Check with your health provider to see what they recommend.