Vietnam documented five imported COVID-19 patients on Friday who had been quarantined upon arrival from abroad, according to the Ministry of Health.
One of the new cases is an Indian expert who flew from India and transited Myanmar before entering Vietnam.
The other four are Vietnamese returnees from Japan, France, and Russia.
The five patients are treated in Khanh Hoa Province, Hanoi, and Ba Ria-Vung Tau Province.
The health ministry announced one recovery on Friday, bringing the total number of recovered patients to 1,070.
Vietnam has recorded 1,212 coronavirus patients as of Friday night, with 35 virus-related deaths.
The country has spent 65 consecutive days detecting zero community cases, thanks to aggressive contact tracing and mandatory quarantine schemes.
Vietnam has been proactive in tracing contacts, treating patients, and quarantining suspected cases so it has managed to clear more than 96 percent of the infections, Deputy Minister of Health Nguyen Truong Son said on Friday.
The Southeast Asian country should be wary as the novel coronavirus has re-emerged in many parts of the world, he warned.
Over 47 million people around the world have caught the coronavirus while above 1.2 million have died of it as yet, the official said, claiming no other diseases have been more contagious and dangerous than COVID-19 for the past 100 years.
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.