Rarrabuwa ta WHO
A cikin 2015, IARC, sashin bincike na ciwon daji na WHO, ya rarraba naman da aka sarrafa (bacon, naman alade, tsiran alade, salami, naman da aka busar) a matsayin Rukuni na 1 — 'maye gurbi ga ɗan adam' — don ciwon daji na hanji, iri ɗaya da taba da asbestos. Jan nama (naman sa, naman alade, rago) an rarraba shi a matsayin Rukuni na 2A — 'mai yiwuwa maye gurbi.' Babu ɗayan rarrabuwar da ke nufin nama yana da haɗari kamar shan taba; yana nufin shaidar haɗin kai tana da ƙarfi sosai.

