Each infective disease has its special toxine, and for the destruction of each the blood prepares its particular antitoxine; possibly, however, some of the antitoxines may be efficacious against more than one kind of toxine, for there are physicians who are convinced that vaccination is a temporary preventive of whooping-cough.

He never had showed no disposition to be christened, an' ever sence the doctor tried to vaccinate him he seemed to git the notion that christenin' an' vaccination was mo' or less the same thing; an' sence that time, he's been mo' opposed to it than ever.