Dengue fever is an acute infectious disease transmitted by mosquito bite, prevention is generally divided into the following three aspects: 1, isolate the source of infection: for dengue fever, early detection, early diagnosis, early isolation is the main, dengue fever is generally in the onset of 6-18 hours before and within 3 days after the onset of infectious, so this period requires close isolation of patients; 2, cut off the transmission The dengue fever virus is transmitted by mosquito bite, so mosquito prevention and mosquito control is the main preventive measure; 3. There is no vaccine for dengue fever in clinical use, and it is expected that a vaccine for dengue fever will be available for application in the future. Therefore, the prevention of dengue fever includes three aspects, namely, isolating the source of infection, cutting off the transmission route, and protecting susceptible people.