RT Journal T1 THe prevention of malaria JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1909 FD October 9 VO LIII IS 15 SP 1194 OP 1194 DO 10.1001/jama.1909.02550150050009 UL http://dx.doi.org/10.1001/jama.1909.02550150050009 AB Malarial disease is so familiar to us in its milder forms that few, even of experienced practitioners, have an adequate conception of what its actual cost in human life and human health is in the aggregate in our country. Figures which may be assumed to be reliable, as quoted by Dr. Seale Harris in his article in this issue, give us a mortality, as he says, greater than that of any or all the epidemics of yellow fever in the last half century. Taking into account that mortality is a very poor index of the actual damage done by this disease, since Dr. Harris says that probably not one in five hundred of those affected dies, these figures are sufficiently formidable. It is the morbidity caused by malaria, however, that is the factor mainly to be considered, and the importance of this can hardly be overestimated. Without going into the