The main hurdle to create a vaccine against dengue is that the virus comes in four different varieties known as serotypes. If the person recovers from one serotype then he becomes immune to only that particular serotype and not the other three, so the individual has all the chances of getting dengue from the other serotypes. However, different approaches to develop a new vaccine are being tested and some of them are already in clinical trials.
A Malaysian prince has come up with a new organic pesticide called 'QuitiKill' that kills mosquito larva, hence preventing the spread of dengue. QuitiKill is a non-toxic pestiside and is not harmful for the humans, animals and fishes. The rice husk is used as a carrier for this pesticide and a floating device for the formulation. It requires less than a hour to kill the larva of the mosquitoes, from the moment of application. And the efficacy of the product lasts for a month. QuitiKills works by interfering in the process of protein digestion in the larva and causes metabolic starvation and larval death, reported Business Standard.
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