PERSONAL AND CIVIC HYGIENE 333 



c. Development of Immunity 



Note. Immunity is such a state of the body that disease 

 germs are comparatively harmless. It depends on the power 

 of the blood and other fluids of the body to kill germs. 



Observations. 1. Are there any advantages to the body 

 because of plenty of fresh air, good food, rest, and exercise ? 



2. Review the functions of the white corpuscles of the blood. 



3. What effect has alcohol on the white corpuscles? 



4. What are antitoxins? Note. An antitoxin is a sub- 

 stance that prevents poisons commonly developed in the body 

 from the growth and action of disease germs from harming the 

 body. They are given to prevent such diseases as diphtheria, 

 rabies, etc. Name others. 



5. How are antitoxins given? Note. Whenever germs 

 in antitoxin or vaccine are introduced into the body artificially, 

 the person receiving the germs is said to be inoculated. 



6. What is meant by vaccination? Note. Smallpox, 

 cholera, anthrax in cattle, and hydrophobia are being success- 

 fully fought by means of vaccination to-day. 



7. Explain the modern treatment for consumption. 

 Conclusion. Write a paragraph, summing up all you know 



as to the different means of bringing about immunity in the 

 body. 



d. Work of the Board of Health 



" The greatest problem of the health official is the influential 

 citizen who insists on his right to live like a hog, and be a 

 menace and a nuisance to all his neighbors." An American 

 Health Official. 



Note. All citizens should obey their instructions implicitly 

 and aid Health Boards to the best of their ability. 



1. See that certain laws are enforced to prevent causes of 

 sickness and spread of diseases. What diseases ? 



2. Placard all houses with contagious diseases, quarantine 

 the inmates, and later disinfect the house. Why ? 



