You are presented with the question "What is one thing studied in immunology?" and the following answer choices: 
- illness
 - antigens
 - humanism
 - health
 - philosophy
 - resistance
 - symbology
 - fever

Now knowing that antigens are molecules that the immune system recognizes as foreign to the body and immunology is the study of the immune system, choose the best answer.


 

  antigens       