According to experts, allergy tends to be a genetic disease, meaning that a child descendant from a mother or a father with allergy is at increased risk.
Mindzavisiso yi komba leswaku xitekela hi xona xi endlaka leswaku munhu a va ni vuvabyi byo karhi, hi ndlela yoleyo n'wana u tala ku va ni vuvabyi bya ku va miri wu ala swakudya hikwalaho ka leswi mutswari un'we kumbe havambirhi va tshameke va va na byona.