“The research, published in the journal Science, analysed all publicly available clinical trial data for the vaccine. The results suggest that in people who have never been exposed to dengue before, the vaccine primes the immune system so that if they are subsequently infected, the infection is more severe.”
“Benefits and risks of the Sanofi-Pasteur dengue vaccine: Modeling optimal deployment,” Science, science.sciencemag.org/cgi/doi … 1126/science.aaf9590