What does not using incertize sprey and Coil cause Malaria?

Not using insecticide spray and coils can increase the risk of getting bitten by mosquitoes carrying the malaria parasite, which can lead to contracting the disease. These products are designed to repel and kill mosquitoes, which are the primary carriers of malaria. By not using them, individuals are more vulnerable to mosquito bites and therefore more susceptible to contracting malaria.