In 1906 the New York Board of Health supplied antimeningitis serum for use subcutaneously in cases of epidemic cerebrospinal meningitis, but it was found to be of slight avail and its preparation and use were discontinued. In July, 1910, after Jochmann, Flexner and Wassermann had proved its value when used intraspinously, the Rockefeller Institute gave the Health Department two horses immunized against the meningococcus, and a generous supply of antimeningitis serum. Since that time the Health Department has prepared it and offered the services of a consultant to every physician reporting a case of meningitis not in a hospital. In that way we have seen 247 cases, at least half of which were reported as epidemic cerebrospinal meningitis and the rest either as meningitis, kind not designated, or as tuberculous meningitis.
Table 1 shows what a large percentage of error there must be in the usual statistics of meningitis
DuBOIS PL. DIFFERENTIAL DIAGNOSIS AND TREATMENT OF EPIDEMIC CEREBROSPINAL MENINGITIS. JAMA. 1913;60(11):820–822. doi:10.1001/jama.1913.04340110026009