The number of dengue fever cases in Hà Nội has increased since the beginning of this year, even though it is not yet high season for the disease. Statistics released by the Hà Nội Department of Health showed that since the beginning of the year, the capital has recorded 699 cases of dengue fever, double the amount of the same period last year. Most patients came from Đống Đa, Hoàng Mai, Hai Bà Trưng and Thanh Xuân districts. Just in Đống Đa, as many as 165 cases were reported in 18 wards, a threefold increase compared with the same period last year. At present nine patients are still receiving treatment.