Dengue Vaccine Found to Worsen Disease Symptoms

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By Ben Tinker, CNN

The Philippines has suspended its large-scale dengue vaccination effort amid the surprising results of a new study conducted by the vaccine’s manufacturer.

On Wednesday, French pharmaceutical giant Sanofi Pasteur published clinical trial data showing that its dengue vaccine, Dengvaxia, could have unintended consequences in patients who had never been infected with the mosquito-borne virus.

“The analysis confirmed that Dengvaxia provides persistent (protective) benefit against dengue fever in those who had prior infection,” Sanofi said