Helicious diseases have been known since ancient times, as evidenced by Egyptian manuscripts. There were no modern antiparasitic drugs then. How did our great-grandmothers treat these diseases? And why is taking pills alone not only useless, but sometimes no less dangerous than the parasites themselves? Answering these questions, the author in an original form highlights the most pressing problem of our time - parasitism as a phenomenon. Who are parasites, what to expect from such uninvited guests and, most importantly, how to protect yourself from them and protect your children - you can read about all this in this book. Intended for a wide audience.