Sales prospects for Sanofi's dengue vaccine Dengvaxia took a big hit when the French group admitted that use of the world's first approved shot against the mosquito-borne virus will be curbed due to evidence it can worsen the disease in people who have not previously been exposed to the infection.
Sanofi's Dengue Vaccine Health Warning Seen Hitting Product's Sales
The French drug manufacturer admits the world’s first dengue vaccine may be harmful when administered to individuals not previously infected with the disease.
