The parasitic world affecting the human body is great. Each third resident of Europe is infected with parasites. Parasites in the human body are divided into foreign (insects, leeches) and internal (worms). It all does great damage to human health.
Parasites are protozoa - single-celled microorganisms that cause dangerous diseases in humans. Protozoal infections are contagious, have serious consequences, and require timely treatment.
