Kolkata: An 11-year-old boy reportedly died of dengue at a private hospital in Park Circus on Wednesday. His health condition deteriorated fast. Hospital authorities in the death certificate mentioned that the patient had been suffering from severe dengue. The conservancy workers from the civic bodies are conducting a massive crackdown on all the potential mosquito breeding areas. The family members of the victims alleged that all the 15 persons were administered wrong injection following which their health condition deteriorated..