Bioethics News

New Dengue Vaccine Could Instead Cause More Cases, Experts Warn

September 1, 2016

(CNN) – But in the new study, published Thursday, Ferguson used data from the clinical trials to assess the impact of using the vaccine in different settings and found that its use in areas with low levels of disease, where people are unlikely to have been previously exposed to dengue, could lead to an increase in people severely affected by the infection due to the complexities of the virus and the way it interacts with our immune system. “Unlike most diseases, the second time you get dengue, it’s much more likely to be severe than the first time you get it,” Ferguson said. When people who have never experienced the infection get immunized, the vaccine may act like a silent infection, gearing them up for a more severe infection should they face the real form of the virus.

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