Dengue fever claimed 42 lives out of 51,300 infections in Vietnam over the first nine months of 2012, according to the Ministry of Health.
In September alone, 13 people out of around 13,000 infections died from the disease.
Previously, the Vietnam Administration of Preventive Medicine predicted dengue fever would peak in August and September, given that the rainy season came early this year and millions of students entered a new school year across the country.
Although dengue fever occurs year-round in Vietnam, it peaks in the hot rainy months of July and August. There is no vaccine or medicine against dengue fever.
The VAPM has urged residents to protect themselves against outbreaks of dengue fever by cleaning places where mosquitoes and larva may live, such as bushes, and killing the insects to stop the spread of dengue fever.