All of the following factors are responsible for resurgence of malaria, Except -
Drug Resistance in Parasite
Insecticide Resistance in vectors
Antigenic mutations in parasite
Use of bed nets
Resurgence of Malaria in India has occurred due to Drug resistance Vector resistance Mutation in Parasite Use of bed-nets (primary level of prevention) is in fact likely to reduce incidence of malaria Ref: Park 22th edition Pgno : 716-718
Communicable diseases