CITY REPORTS FOR WEEK ENDED JANUARY 20, 1923-Continued. POLIOMYELITIS (INFANTILE PARALYSIS). The column headed "Median for previous years" gives the median number of cases reported during the corresponding weeks of the years 1915 to 1922, inclusive. In instances in which data for the full eight years are incomplete, the median is that for the number of years for which information is available. See p. 268; also Current State summaries, p. 255, and Monthly summaries by States, p. 259. 27540°-23--3 CITY REPORTS FOR WEEK ENDED JANUARY 20, 1923-Continued. SMALLPOX. The column headed "Median for previous years" gives the median number of cases reported during the corresponding weeks of the years 1915 to 1922, inclusive. In instances in which data for the full eight years are incomplete, the median is that for the number of years for which information is available. CITY REPORTS FOR WEEK ENDED JANUARY 20, 1923-Continued. TUBERCULOSIS. See p. 268; also Current State summaries, p. 255. TYPHOID FEVER. The column headed "Median for previous years" gives the median number of cases reported during the corresponding weeks of the years 1915 and 1922, inclusive. In instances in which data for the full eight years are incomplete, the median is that for the number of years for which information is available. |