John stepped on a nail a few days ago and has developed a bacterial infection that his immune system is fighting. The bacteria in his body that triggered an
Immune response are called

Question

Quizplus · Accepted Answer

Antigens are substances that the immune system recognizes as foreign and can trigger an immune response. In the context of a bacterial infection, the bacteria or parts of the bacteria (such as proteins on their surface) act as antigens that the immune system responds to.

John Stepped on a Nail a Few Days Ago and Has