FIG. 13 



Vaccine vesicle upon seventh day, showing beginning areola. Patient was suffering from scarlet 

 fever. Vesicle shows some irregularity in form. (Taken from Welch and Schainberg.) 



FIG. 14 



Vaccine vesicle upon ninth day, showing more pronounced areola. 

 (Taken from Welch and Schamberg.) 



Same patient as Fig. 13. 



