what is juju

Does Juju only effect Africans?   juju2 /ˈdʒuːdʒuː/ noun noun: juju; plural noun: jujus a charm or fetish, especially of a type used by some West African peoples. supernatural power attributed to a charm or fetish. “juju and witchcraft” Origin early 17th century: of West African origin, perhaps from French joujou ‘toy’. (Exert from google)