As we progress downward, the triple-sectioned main structure comes into view, in the shape of two back-to-back E's. Here we can see how the Losheng Sanatorium was designed with quarantine as its main purpose, with the sections isolating the pathogens and patients. In the middle is a "changing room" that served as a restricted area between the second and third sections: medical practitioners and patients passing through were disinfected here.
再往下走，呈現「王」字結構的三進式主院區，則可以看出以「隔離」為首要目的的樂生院，如何在設計上一層層隔絕病菌與病患──第二進中央的「更衣室」作為第二進與第三進之間的管制區，通過的醫療人員和病患就在此消毒。