2023-10-30 13:33:37
“Yellow Fever” spread by Aedes mosquitoes!! Scholars worry: Yellow fever may come back and attack the southern United States
Recently, scientists from Baylor University published a alarming article in the New England Journal of Medicine, in which they expressed their concern.concerns regarding a potential resurgence of yellow fever and calls for prioritizing yellow fever prevention and control in national pandemic preparedness planning.
The causative agent of yellow fever is yellow fever virus, like dengue virus or Zika virus.Transmitted by Aedes mosquitoesbut itsThe fatality rate is much higher (20-50% of patients entering the poisoning stage die within 7-10 days). At present, the main epidemic areas are in Africa and Latin America, but it has also been endemic in North America, Europe and other places in the past; for example, from 1820 to 1905, yellow fever was reported in New Orleans, Galveston, Memphis and other places in the United States. Southern U.S. cities such as Charleston experienced periodic epidemics that killed large numbers of people.
The author of the above-mentioned article stated that it has been observed recently that GermanyTexas, Florida and other parts of the southern United States are seeing an increase in mosquito-borne diseases, including malaria, dengue fever, Chikungunya fever and Zika virus infection, now, yellow fever has also become a vigilant item, because yellow fever seems to be spreading rapidly in tropical areas of Latin America such as Brazil and Venezuela! They suggest that active pandemic prevention requires strengthening local health departments to expand surveillance activities, combating vector mosquitoes and the diseases they transmit, and developing antiviral drugs, vaccines, and new gene drive technologies (such as genetic engineering to permanently alter insect genes). ) to control mosquitoes, etc.
So far,Although there is no evidence that Asia has ever had indigenous cases of yellow fever, global transportation, there are still occasional cases of imported cases; in addition, Taiwan is located in the subtropics, where vector mosquitoes are prone to breed, and the distribution of Aedes aegypti mosquitoes also means that risks still exist. With global warming and urbanization, the environment is becoming more and more favorable for mosquitoes to survive. Therefore, both the United States and we urgently need comprehensive plans to protect high-risk areas from mosquito-borne diseases.
* The yellow fever vaccine currently used in China is an active attenuated vaccine. It can produce protection in regarding 7 to 10 days following subcutaneous injection. More than 90% of people can provide lifelong protection with one dose. If you want to travel to high-risk areas Travelers from this area are recommended to get vaccinated 10 days before going abroad.
Source: Medical Xpress, CDC, Baylor University
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