The latest announcement means Vietnam has gone 36 hours without a new case.
Of the country's 270 patients, 230 have been discharged from hospitals, but five among them have relapsed. The 45 active infections include the relapse cases.
As of last Friday morning, Vietnam had gone eight straight days clear of new infections, but the evening saw two new cases- both students who returned from Japan. They were quarantined on arrival and are now under treatment in Hanoi.
The nation has had five relapses. The relapse cases are being monitored at different hospitals. The Central Institute of Hygiene and Epidemiology and Ho Chi Minh City Pasteur Institute have cultured the virus taken from them to try and find the cause of the relapse.
Deputy Health Minister Nguyen Thanh Long said Saturday that while Vietnam has had very few new cases, there could be unrecorded people carrying the virus as infection cases that have no clinical symptoms are easy to be ignored during screening.
The Covid-19 pandemic has reached 210 countries and territories with a reported death toll of almost 203,000.