Prevention of mosquito breeding places remains our mainstay. However to stop or to slow down the transmission it may be supplemented by "thermal fogging", using fogging machines. In fogging,we use an insecticide that has an immediate knock-down effect on adult mosquitos. When fogging is undertaken after an epidemic occurs, it is unfortunately too late. Fogging, to be effective, should be done at about 3-4 days interval. It is expensive and time consuming. Therefore, measures undertaken by the community, for the community, toprevent the breeding of mosquitoes is far more cost-effective than containment measures once an outbreak occurs.
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