Health workers conduct Covid-19 screening at the Samut Sakhon market on Sunday.
The new cases include 397 migrants in the southwestern province of Samut Sakhon, where an outbreak was discovered at the weekend following positive tests for Covid-19 among hundreds of workers at a large seafood centre. Authorities said buyers from 22 provinces were known to have been there from Dec 1-18 and should get tested.
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