VACCINES IN TREATMENT OF DISEASE 275 



Recovery from colds follows in the same way 

 as recovery from other infectious diseases : anti- 

 bodies are formed, which destroy the attacking 

 bacteria. These antibodies are specific for each 



Bacillus influenzae. X 1,100 diameters. 



microorganism concerned that is, if antibodies 

 for the pneumococcus alone are produced in 

 sufficient quantities to destroy that microorgan- 

 ism, the other bacteria present may still be able 

 to continue the infectious process. Hence, be- 

 fore recovery can take place, specific antibodies 



