Sanofi Pasteur, the vaccines division of Sanofi announced that its tetravalent Dengue Vaccine candidate demonstrated proof of efficacy against Dengue, a threat to almost 3 billion people, in the world’s first ever dengue efficacy trial conducted in Thailand, with excellent safety. The vaccine generated antibody response for all four dengue virus serotypes. Evidence of protection was demonstrated against three of the four virus serotypes circulating in Thailand. Analyses are ongoing to understand the lack of protection for the fourth serotype in the particular epidemiological context of Thailand.
The study was conducted in 4,002 children aged 4 to 11 years, in partnership with the Mahidol University under the patronage of the Thai Ministry of Public Health in Muang district of the Ratchaburi Province.
The full data resulting from this first efficacy trial are currently under review by scientific and clinical experts, as well as public health officials. Detailed results of this study will be published in a peer-reviewed journal and presented to the scientific community later this year.Large scale phase III dengue vaccine clinical studies with 31,000 participants are underway