Samut Sakhon goes into lockdown 5 Infections surge to 548 after tests of migrant workers published : 19 Dec 2020 at 22:23 5 Samut Sakhon has been put under lockdown with a curfew from 10pm-5am in effect until Jan 3 following a surge of more than 500 Covid-19 cases on Saturday. People’s movements out of the province are also banned. Dr Opas Karnkawinpong, director-general of the Department of Disease Control, said the 12 local infections initially reported earlier in the day had surged to 548 following the testing of 1,192 people in the province. Most of them are migrant workers from Myanmar. “The rate of infection is 43% from tested people and 90% of them are asymptomatic,” he said during a televised briefing at 9pm Saturday.