People and clothing [both] become tamei from a zav. People have a stringency that clothing does not have, and clothing [has a stringency] that people do not have. A person who touches a zav renders clothing tamei, whereas clothing that touches a zav does not render [other] clothing tamei. Clothing has a stringency [that people do not have]: Clothing that ‘‘carries’’ a zav renders a person tamei, whereas a person who carries a zav does not render [another] person tamei.