Chikungunya is a single serotype unlike Dengue which has four serotypes. Chikungunya occurs only once in a life time of an individual. At present, there is no evidence of recurrence. Whereas, Dengue can reoccur.
Chikungunya is transmitted by Aedes aegypti which is a day time feeder. It is an intermittent biter and prefers to bite more than one person during the feeding period. This mechanism has made Aedes aegypti a very highly efficient epidemic vector mosquito. An occasional patient can have both chikungunya and dengue at the same time.
Chikungunya is a mild illness in children in majority of cases , however sometimes Chikungunya can be life threatening with multi organ dysfunction with DIC. Deaths and severe neurological sequelae have been reported.