Answer:
a strong feeling of favour towards or against one group of people, or on one side in an argument, often not based on fair judgement or facts
Explanation:
an interest in one thing more than others; a special ability
to influence somebody/something, especially unfairly; to give an advantage to one group, etc.
O blood is called the UNIVERSAL BLOOD DONOR as they can give to any other blood type.
The answer is that they do not live on or in the body of a host.