During the 1920 epidemic the author made a house-to-house canvass in six representative districts in the city of Boston covering a population of 10,000 individuals. The curve of incidence of influenza corresponds closely with the curves for the city and the state as a whole. The peak was reached in the same week, the week ending February 7th, the curve was symmetrical, and the duration of the entire epidemic was about the same. The morbidity rate for 1920, according to our influenza census, was but half of that for 1918 for the same population. The recurrent epidemic as we will show later was decidedly milder (see Chart XVIII). In Detroit the 1920 epidemic reached its peak for morbidity on the 9th day, and that for mortality on the 16th. In 1918 the morbidity peak was not attained until the 15th day and the death peak on the 22d. The recurrent outbreak had nearly run its course within three weeks. The following comparison between the influenza incidence in 1918 and 1920 in Detroit is taken from a report by H. F. Vaughan, Commissioner of Health for that city. In it is shown a comparison of the total figures on the twenty-seventh day of each of the two epidemics: _A Comparison of the 1918 and 1920 Epidemics of Influenza in Detroit. Statistics Made to Include Through the Twenty-seventh Day of Each Epidemic._ ═══════════════════╤════════════╤════════════╤════════════╤════════════ │ │ │ Normal │ Excess │ │Deaths from │ influenza │ influenza │ Influenza │ influenza │ and │ and │ cases │ and │ pneumonia │ pneumonia │ │ pneumonia │ deaths for │deaths above │ │ │this season │ normal ───────────────────┼────────────┼────────────┼────────────┼──────────── 1920 (Jan.–Feb.) │ 11,202│ 1,642│ 197│ 1,445 1918 (Oct.–Nov.) │ 16,423│ 1,286│ 124│ 1,162 ───────────────────┴────────────┴────────────┴────────────┴──────────── There had been fewer cases reported on the twenty-seventh day of the 1920 epidemic, but these had resulted in a greater number of deaths. On this day the recurrent epidemic had run its course, while the 1918 one was still in full swing. On the twenty-seventh day of 1918 there were 137 influenza cases reported and 49 deaths. On this day in 1920 there were but 24 cases and 34 deaths. Thus the second outbreak was of shorter duration, but was more deadly while it lasted.