TYPHOID VACCINATION: ROUTINE IMMUNIZATION OF THIRTY-FIVE HUNDRED PATIENTS IN AN INSTITUTION

In 1912 I immunized 898 patients of this hospital against typhoid fever and reported the procedure.1 Inoculation of all patients was made a matter of rou tine, and the number of subjects immunized since the last report was written is 2,602. In view of the paucity of similar reports in American medical literature, it seems worth while to bring the report up to date.The principal reports of en masse antityphoid inoculation which I have been able to find, excluding those from the army, are summarized in Table 1."Time" in the table refers to the time after the last inoculation was made that the blood was taken for agglutination tests.In this institution inoculation is voluntary for the attendants and compulsory for the patients. At first all patients over 50 years of age were excluded, as well as the patients who presented distinct contraindications. But shortly after the