_Pneumonia as a Sequel to Respiratory Diseases._ (All troops in United States in 1917.) ─────────────────┬─────────────────┬─────────────────┬───────────────── │ │ No. of cases │ Per cent. of Primary diseases.│ No. of cases. │ followed by │cases followed by │ │ pneumonia. │ pneumonia. ─────────────────┼─────────────────┼─────────────────┼───────────────── Measles │ 47,573│ 2,075│ 4.37 Scarlet Fever │ 1,966│ 54│ 2.75 German Measles │ 8,982│ 39│ 0.43 Bronchitis │ 41,233│ 20│ 0.049 Influenza │ 32,248│ 19│ 0.059 Meningitis │ 1,027│ 13│ 1.27 Tonsillitis │ 43,021│ 7│ 0.016 Pulmonary │ 6,799│ 6│ 0.088 tuberculosis │ │ │ Laryngitis │ 4,633│ 2│ 0.043 Diphtheria │ 1,163│ 1│ 0.086 Mumps │ 21,725│ 0│ 0.000 Pharyngitis │ 8,096│ 0│ 0.000 ─────────────────┴─────────────────┴─────────────────┴───────────────── _Influenza and Pneumonia in Last Four Months of 1918._ Number of cases of influenza 338,343 Number of cases of influenza followed by pneumonia 50,700 Number of deaths from influenza-pneumonia 17,700 Stallybrass, who has studied the influenza and pneumonia deaths in Liverpool, England, since the 1889 pandemic, states that in every year there had been reflected in the curves evidence of periodic increase in deaths from influenza and pneumonia, and he states that from 1914 onward there has been a progressive increase in the annual number of influenzal deaths with the single exception of 1917. It becomes evident that we cannot with the information at hand find any one locality in which the disease was prevalent sufficiently ahead of the pandemic and to the exclusion of other localities, so that we might determine accurately the site of origin. The next step will be, then, to discover as accurately as possible the date at which various communities were first definitely attacked by the great pandemic, and to search out the locality first affected. DATE OF FIRST INCREASED PREVALENCE IN VARIOUS LOCALITIES.