They developed a tendency to shirk every movement that didn’t seem absolutely necessary or called for efforts that seemed too great to be worth while. Thus these men were led to break, oftener and oftener, the rules of hygiene they themselves had instituted, to omit some of the numerous disinfections they should have practiced, and sometimes to visit the homes of people suffering from pneumonic plague without taking steps to safeguard themselves against infection, because they had been notified only at the last moment and could not be bothered with returning to a sanitary service station,
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