Vaporized pyrethroids (for example in mosquito coils) are also insect repellents. Malaria is transmitted by the bite of an infected female mosquito. Many insects have a parasitic relationship with humans such as the mosquito. The virus is transmitted by mosquito bites. Prevention focuses on protecting against mosquito bites in endemic regions. Infection in humans begins with the bite of an infected female "Anopheles" mosquito. The disease is most commonly spread by an infected female "Anopheles" mosquito. Females of the mosquito genus "Anopheles" prefer to feed at night. Symptoms usually begin ten to fifteen days after being bitten by an infected mosquito. The second strategy is to reduce populations of the adult yellow fever mosquito. Today, they reduce the mosquito and mole cricket populations. Later, he arrives at meetings with mosquito bites on his face. The human-infective stage are sporozoites from the salivary gland of a mosquito. It has been described as feeling like little more than a mosquito bite. Unfortunately, it is susceptible to many chemicals used in mosquito abatement programmes.