Leeches can truly benefit humans. They have a special substance called hirudin, which they inject into the bloodstream when they bite and stick to a person. This substance promotes blood thinning, which is used to prevent thrombosis in human blood vessels. But like any manipulation of blood, infection is possible with the bite of leeches, so you need to be careful.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.