A 64-year-old woman in the beach city of Nha Trang and a pregnant 33-year-old in Ho Chi Minh City fell sick in late March, and three rounds of tests have confirmed they are Zika-positive, health officials said.
The sufferers are in stable condition and no further infections have been found among their relatives and neighbors, the health ministry said in a statement.
“After epidemic investigations, we consider the source of infection could be mosquito,” Deputy Health Minister Nguyen Thanh Long said of the patient in Ho Chi Minh City.
She is eight weeks pregnant, Long said in a Vietnam Television broadcast, but gave no details of the first woman.
Health officials have quarantined the living areas of the patient's families and taken samples from others living nearby for further tests, said Nguyen Chi Dung, head of Ho Chi Minh City’s department of preventive medicine.
The World Health Organisation (WHO) is working closely with Vietnam, a WHO official told a health ministry meeting to announce the infections.
