It is usual at coroners’ inquests on vaccination fatalities to produce children vaccinated at the same time from the same vaccinifer, and to assert that inasmuch as they have made good recoveries, it is impossible that the virus was at fault, and that something else than vaccination must have been the cause of death. The argument often impresses a jury, but it is grossly fallacious. Suppose a mad dog bit six men, and that five escaped injury beyond their wounds and fright, and that one died of rabies, would the escape of the five prove that the death of the sixth was unconnected with the dog? Or suppose an equal potion of gin were administered to six infants, one of whom died and five recovered, would the recovery of the five prove that gin did not kill the sixth? Mr. Stoker writes to the newspapers that he vaccinated twelve other persons with the virus he used for Miss Ellen Terry, and that as no untoward symptoms appeared in the twelve, therefore Miss Terry’s whitlow had no connection with her vaccination--and this in spite of the untoward symptoms falling due at the very time that vaccination accounted for them! Any reasons are good for those disposed to be convinced, and who have settled it in their minds that vaccination is invariably harmless. No doubt there is virus used for vaccination that is virulent beyond other virus, as there is virus that is comparatively innocuous; but, as Dr. Mead observed more than a century ago, “It is more material into what kind of body smallpox is infused than out of what it is taken.” The same virus that one constitution may throw off with little effort, may induce disease and death in another. Dr. Joseph Jones, president of the Louisiana Board of Health, relates that “In many cases occurring in the Confederate Army, the deleterious effects of vaccination were clearly referable to the condition of the forces, and the constitution of the blood of the patients; for it was observed in a number of instances that the same lymph from a healthy infant inoculated upon different individuals produced different result’s corresponding to the state of the system; in those who were well fed and robust, producing no ill-effects, whilst in the soldiers who had been subjected to incessant fatigue, exposure, and poor diet, the gravest results followed.” Some constitutions are peculiarly liable to injury from vaccine virus, just as some constitutions cannot endure drugs that others receive without inconvenience. Thus it is that fatalities from vaccination are frequent in certain families. Of these, neither the law nor medical men condescend to take account. Parents often plead in vain for exemption from the rite on the ground that they have already had children injured or slain by its performance; the brutal and unscientific argument running, “How can vaccination hurt your children when it does not hurt other people’s children?” VACCINIA _PLUS_ OTHER DISEASE.