Social and environmental risk factors for dengue in Delhi city: A retrospective study

Wealthier districts had a higher dengue burden despite lower mosquito densities than the Intermediary income communities. This probably reflects dengue being introduced by people travelling from poorer areas to work in wealthier houses. These poorer, high density areas, where temperatures are also warmer, also had dengue cases during the winter. Control strategies based on improved access to a reliable supply of tap water plus focal intervention in intra-urban heat islands prior to the dengue season could not only lead to a reduction in mosquito abundance but also eliminate the reservoir of dengue virus clearly circulating at low levels in winter in socio-economically disadvantaged areas. PLOS Neglected Tropical Diseases

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