Gwajin Abuse na Magunguna, ko gwaje-gwajen muggan ƙwayoyi, ana amfani da su musamman don ganowa da tabbatar da ko mutum ya ci zarafin wani magani. Irin wannan gwajin yana taka muhimmiyar rawa a fagage da yawa, gami da amma ba'a iyakance ga masu zuwa ba:
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