B cells and explaining what they do

Your friend Bruce calls in a panic. He has just come from the doctor and been diagnosed with a bacterial infection. The doctor told him not to worry; his B cells will take care of it in no time! Knowing that you are studying the immune response, he is calling to ask you to explain this statement. Is the doctor correct? Is there more to the story?

Writing Requirements

Minimum of 3 posts (1 initial & 2 follow-up)
Minimum of 2 sources cited (assigned readings/online lessons and an outside source)
APA format for in-text citations and list of references