These figures testify to a nineteen-fold reduction in the number of attacks of enteric fever, and to a threefold reduction in the number of deaths from that disease, among the inoculated.... The only case which occurred among the inoculated was that of a patient admitted to hospital on the thirty-third day after inoculation. It would seem that the disease was in this case contracted before anything in the nature of protection had been established by the inoculation." 9. _Imperial Yeomanry Hospital, Pretoria._ Dr. Rolleston, Consulting Physician to this hospital, writes in the _British Medical Journal_, 5th October 1901: "Among the _personnel_ of the hospital (17 medical officers, 50 nursing sisters, 83 orderlies, etc.), total, 150, there were 22 cases of enteric fever, or an incidence of 14.6 per cent. Of the 150, 35 were inoculated, and of these, 6, or 17 per cent., suffered from enteric; while, of 115 non-inoculated members of the _personnel_, 16, or 13.9 per cent., suffered from enteric fever; the percentage is therefore higher among the inoculated. There were 2 deaths, both in non-inoculated patients. In 100 cases of enteric fever among non-commissioned officers and men, taken mainly from convalescent patients, only 8 had been previously inoculated; there were 3 fatal cases, all among non-inoculated patients. Among 42 officers who had enteric, no fewer than 19 had been previously inoculated; 6 of these 19 cases were severe in character, but none were fatal; of the 23 non-inoculated cases, 7 were severe, and of these 7, 3 ended fatally. The interval between inoculation and the subsequent incidence of enteric fever varied between one and twenty-one months, but in only four instances was the interval less than six months. The average interval between inoculation and the onset of enteric fever in these 19 cases was thirty-eight weeks. "As far as these scanty figures go, they point to the conclusion (1) that anti-typhoid inoculation does not absolutely protect against a future attack of typhoid fever; (2) that when enteric occurs in an inoculated person, there is, as a rule, an interval of about six months; (3) that inoculation protects against a fatal termination to the disease." 10. _Richmond Asylum, Dublin._ The _British Medical_ _Journal_, 26th October 1901, contains a note by Professor Wright on an outbreak of typhoid in this asylum during August to December 1900. Inoculations were begun on 6th September, by Dr. Cullinan, and by 30th November 511 persons were inoculated. After careful criticism of all doubtful cases, Professor Wright gives the following figures:-- _Comparative Incidence of Typhoid Fever in Inoculated and Non-Inoculated, calculated upon the average strength of the representative groups during the period intervening between the commencement of the inoculations and the termination of the epidemic._