At the time of the epidemic of influenza1 and influenzal pneumonia, the military population of the United States Reservation at Fort Riley was 63,374, distributed as in Table 1.
The total number of cases of influenza were divided as shown in Table 2. The influenza incidence for the population of the military reservation was 23.9 per cent.
As will be observed in Table 3, 2,624 instances of pneumonia occurred during the epidemic, of which 2,496 were definitely traceable to influenza.
The largest number of influenza and pneumonia patients admitted to the base hospital was on September 30, when 785 were received. The largest total number of patients in the hospital was 5,666, October 8, of whom 2,951 had influenza and 719 influenzal pneumonia. The largest number of pneumonia patients at one time under treatment in the base hospital was 1,338, October 15, as shown in the accompanying chart. The incidence