Japanese scientists have discovered parasitic worms capable of killing cancer cells.

Osaka University researchers have created hydrogel shells containing anti-cancer drugs. If you "clothe" nematode worms in them, they can transport drugs and destroy cancer cells in the human body. Nematodes are tiny, free-living worms that usually live in soil or other ecological niches and, under certain circumstances, can enter the human body. Anisakis simplex, a marine nematode that can colonize humans when eaten, has shown an increased interest in cancer cells.