PREVALENCE OF DISEASE. No health department, State or local, can effectively prevent or control disease without knowledge of when, where, and under what conditions cases are occurring. SMALLPOX-Continued. Kentucky-Leslie County. Smallpox is reported to be present in various parts of Leslie County and on account of it some of the county schools have been closed. The control of the disease is reported to be rendered difficult because of a local prejudice against vaccination. Smallpox is also present in Perry and Letcher Counties. New York-Niagara Falls. Acting Asst. Surg. Bingham, of the Public Health Service, reported by telegraph that during the week ended December 20, 1913, eight cases of smallpox had been notified at Niagara Falls, N. Y. |