Dengue Virus Transmission Dominated by Those with Undetected Infection, Study Finds

Presented by Office of Public Affairs and Communications

People showing virtually no symptoms are likely the primary source of dengue fever, according to new research published in PLOS Pathogens. Nearly 400 million people each year are infected with dengue virus, which is transmitted through mosquitoes.

The study estimates that more than 80 percent of dengue virus infections are attributable to individuals with mild to no symptoms who do not seek treatment from a physician. The study also indicates that nearly a quarter of dengue virus transmission is the result of mosquitoes biting those already infected before the onset of symptoms. By the time those symptoms appear, the opportunity to prevent the virus from spreading has passed.