DIPHTHERIA 109 



Diseases, by Ledingham and Arkwright (London, 

 Edward Arnold, 1912). 



Another important point is the use of the anti- 

 toxin to protect children who have been exposed 

 to the disease. There is no doubt that this pro- 

 tective use of the serum tends to stop the spread of 

 the disease, e.g., in a school, or in a local epidemic: 

 we have evidence, here, not only from our own 

 country, but from France, Germany, and America. 

 But the limits of this procedure are soon reached. 

 Still, in some instances such as might arise if one 

 of a large family of small children were attacked 

 by diphtheria it might be well to protect the 

 other children, if they had been much in close 

 contact with the case. 



