Despite the rising cases of dengue and chikungunya in South India, few epidemiological studies documented the extent of transmission—a gap a household-based seroprevalence survey in Chennai sought to correct.
The team found that 93% of participants had been exposed to dengue virus, and 44% to chikungunya. Almost 1/4 of the susceptible population gets infected by dengue virus each year.
The findings indicated very high transmission potential of the 2 diseases transmitted by Aedes mosquitoes and point to the need for greater surveillance and control efforts, as well as an extremely large proportion of sub-clinical disease and significant under-reporting.
PLOS Neglected Tropical Diseases