Mosquitoes are pests. They absorb human and animal blood and transmit diseases. The two major diseases caused by mosquitoes, such as malaria and dengue fever, are one of the diseases with high Zui mortality worldwide.

　　Malaria, in particular, is considered to be one of the diseases of the same degree as tuberculosis and AIDS. Hundreds of thousands or even millions of people around the world die of malaria every year.

　　Mosquitoes, rats, cockroaches and other animals are considered "four pests". They possess the characteristics of fast reproduction and strong adaptability. Therefore, even in the modern age of science and technology, there is still no way to kill mosquitoes completely.

　　Mosquitoes exist on the earth for 170 million years. According to statistics, there are more than 2500 species of mosquitoes in the world. Dozens of them bite animals and humans, but these mosquitoes have become Zui species in the animal kingdom.

　　In order to reduce the number of mosquitoes, Verily, Alphabet's Life Sciences subsidiary, began the research on "sterilization of mosquitoes", which aims to reduce the number of mosquitoes by infecting them with a virus and spreading them through them.

　　Verily uses a natural bacterium called Wolbachia, which infects mosquitoes and other mosquitoes. After mating, the next generation of mosquitoes will not be able to reproduce.

　　The experiment achieved remarkable results in the preliminary test. After the release of about 15 million "sterilized mosquitoes" to the northern part of the country, the number of mosquitoes in the area decreased significantly.

　　In Egypt, the results of the experiment were even more surprising. The number of Aedes aegypti mosquitoes decreased by nearly 96 percent, but when everyone was happy, the experiment had unexpected results.

　　This group of "sterilized mosquito" gene actually appeared "mutation" phenomenon.

　　Some time ago, scientists put 450 thousand "sterilization mosquitoes" in the Jacobina area of Brazil. However, 18 months later, the mosquitoes showed signs of "rebound", and the number of mosquitoes did not increase.

　　Local mosquitoes have the ability to automatically modify genetic genes through hybridization and produce a new generation of "super mosquitoes", and researchers have explained that the offspring of local mosquitoes and genetically modified mosquitoes may become stronger by hybridization. In the future, humans will face greater challenges in killing mosquitoes.