If antigens are molecules that the immune system recognizes as needing to be rejected from the body, then antigens are molecules that the immune system recognizes as needing to be what?

Answer choices:
- welcomed into the body
 - it needs them
 - stored in the body
 - accepted into the body
 - major threat to health
 - Something that causes allergies
 - rejected from the body
 - members of their own species

 

       rejected from the body   