CITY REPORTS FOR WEEK ENDED MARCH 31, 1923—Continued. CEREBROSPINAL MENINGITIS. The column headed "Median for previous years" gives the median number of cases reported during the corresponding week 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. 855; also Current State summaries, p. 842, and Monthly summaries by States, p. 846. CITY REPORTS FOR WEEK ENDED MARCH 31, 1923-Continued. See p. 855, also Current State summaries, p. 842, and Monthly summaries by States, p. 846. CITY REPORTS FOR WEEK ENDED MARCH 31, 1923-Continued. POLIOMYELITIS (INFANTILE PARALYSIS). The column headed "Median for previous years" gives the median number of cases reported during the corresponding week 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. |