14 dengue fever outbreaks increased compared to last week, distributed in 19 districts, towns and cities such as: Bac Tu Liem, Phuc Tho, Thanh Oai, Cau Giay, Chuong My, Dan Phuong, Hoan Kiem... Accumulated from the beginning of 2024 until now, Hanoi has had 3,251 cases of dengue fever.
Last week, Hanoi CDC coordinated with relevant units to monitor and handle outbreak areas and develop plans to prevent and control dengue fever in flooded areas such as Nam Tu Liem, Tay Ho, Hoang Mai, Hoan Kiem, etc.
CDC Hanoi warns that from September to November every year is the time when dengue fever develops strongly, due to complicated weather conditions, heavy rain causing flooding creating an environment for mosquitoes to breed. Some districts have warned of a high number of people being hospitalized, making it easy for an outbreak to occur.
In Vietnam, in the past 5 years, dengue fever has become increasingly complicated. In the period 2019 - 2023, Vietnam experienced 2 peak epidemics in 2019, recording more than 334,231 cases of dengue fever and in 2022, the number of dengue fever cases reached a record of 367,729 cases.
In 2023, the country continued to record more than 172,000 cases of dengue fever, resulting in 43 deaths. Although the number of cases decreased by about 54%, the dengue fever epidemic in Vietnam from 2023 to present has been more complicated and unusual than in previous years.
According to the Ministry of Health, Vietnam currently has 4 types of dengue virus circulating, but the main circulating virus types are DENV-1 and DENV-2. DENV-2 type is often associated with severe dengue fever cases, which are the cause of death.
In September 2024, the Qdenga vaccine against dengue fever for children from 4 years old and adults was put into use. The Ministry of Health recommends that people get vaccinated to reduce dengue fever cases.
According to research, this vaccine can prevent dengue fever caused by 4 types with an effectiveness of over 80% and reduce the risk of hospitalization, severe illness and dangerous complications by over 90%. In particular, the vaccine is effective in preventing reinfection in people who have had dengue fever.
