This happens every few years in Thailand; it's become like their informal equivalent of a general election. You won't be affected unless you live or work in the small areas where the protests are active, or join in, or just happen to be passing by when the authorities lose their patience and start firing.
Thais can either choose free quarantine provided by the state (paid for by taxpayers), in which case they will be sent wherever there is space, or book a hotel under the alternative state quarantine scheme (and pay the same price as foreigners). I think there is only one in Pattaya. Most are in Bangkok.
the number for foreign tourists coming in will be literally limited by quarantine capacity to less than 1% of 2019 levels. it won't make much difference to the supply and demand balance.
yes of course they will. in 2019 china (including hong kong and taiwan) contributed over 600 BILLION baht to the thai economy. russia and malaysia were both just over 100 billion, and no other country was even above 90 billion.
great news. most chinese cities haven't had any infections for half a year. and chinese are the most important nationality for thailand's tourism industry (by a factor of 10).
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