痘疹心法要訣

痘原：上古無痘性淳樸，中古有痘情欲恣，痘稟胎元出不再，毒之深淺重輕識。天瘡之名因天稟，瘡形如豆痘名居，塞北不出寒勝熱，毒發必自待天時。···