I read about an interesting fact – there are single-celled plasmodiums that have learned to reproduce in a quite interesting way. They transfer from the host to a specific type of mosquito (Anopheles), which carries them to a new host, because the previous one is very likely to die soon. It is important that not just any mosquito will do, and not every bite carries the plasmodium. If there are too few bites, these plasmodiums as a species will die out. Therefore, while developing in the body of the infected host, they provoke the biosynthesis of volatile substances, the smell of which is attractive to females of a certain type of mosquito. As a result, the host becomes more appetizing, and the “right” mosquitoes bite it more often http://www.pnas.org/content/111/30/11079). In 2018, malaria infected 228 million people and killed 405,000, of which 67% were children under 5 years old. But here I am not talking about malaria, but about the intriguing transmission mechanism that has emerged as a result of millions of years of evolution.
Hi, I'm Rauf Aliev. 