The new patients, aged from 40 to 83, include one returning from Saudi Arabia, and two linked to the Da Nang Hospital hotspot.
These brought the number of cases connected to the outbreak in Da Nang to 421.
Vietnam also confirmed one more death on August 13, raising the total fatalities to 18.
The latest victim is a 52-year-old woman in Da Nang, who had suffered from end-stage chronical kidney failure, hypertension and diabetes Type 2.
