I have been trying to register for a Pfizer booster in Pattaya for the last month with no success. Yesterday, while in Queen Sirikit Sattahip for a routine check up, I asked about booster registration. They sent me up to the 3rd floor where 10 minutes later the needle was in my arm, free of charge, all smiles etc.
It seems to me that the Pattaya hospitals "just maybe" trying to push their Moderna stocks into "rich" expat arms.