Vietnam’s Ministry of Health logged 25 cases of COVID-19 on Sunday, with all patients but one being Vietnamese returnees from overseas.
They were all quarantined upon entry into Vietnam, the health ministry noted.
Seventeen patients returned from Russia, two from Japan, and six from Qatar.
One of the new cases is a Russian expert while the remainder are Vietnamese.
Sunday saw the second-largest number of imported cases since August.
Vietnam has confirmed 1,281 coronavirus cases so far, with 1,103 recoveries and 35 virus-related deaths.
Prime Minister Nguyen Xuan Phuc on Sunday demanded that the country well control COVID-19 when he announced a decision to officially appoint Nguyen Thanh Long, acting health minister, as Minister of Health.
Vietnam began denying entry to foreign nationals on March 22 but the government allows foreign experts, skilled workers, investors, and diplomats to enter the country on a case-by-case basis, subject to mandatory quarantine.
Though international commercial flights are now suspended, charter planes to the country have been arranged to bring in experts, skilled workers, and diplomats, and to repatriate Vietnamese citizens stranded in other nations and territories due to the pandemic.
Vietnam currently charges international arrivals for quarantine.
It provided the quarantine service for free in the past.