The world's worst diseases

Jake and Anna end up so far back that you hardly know what time it is. In the New Stone Age, people have just started living in villages together and because they have a poor grasp of hygiene and what infections animals and people can spread to each other, the children and the villagers suffer from whipworm infection. The village shaman does his best to cure tired and malnourished Anna and Jake with the help of song, dance and power animals. But does it really help with the nasty infection?