I believe that this poem is about trying to find out more to the story than just the facts. I believe is discussing the matter of recieving a deeper and stronger meaning in the topic than what you can read in a book. You can gain knowledge facts, and opinions, and feelings when your learing about something through someone who was there rather than a book. Opinions, beliefs, and feelings can all be expressed through art, (like a story or painting) but history books tend to be based more on facts.
I think that in Germs by walt whitman is about all the different races and beliefs and different types of people. I think its ironic that he's referring to them as germs. Because of discrimination that how some peers would call him as germs yet i don't think he feels this way because he's the one pointing out the different qualities and accepting them in wonderful views of life.
I thought this was a very deep poem. I believe that this poem is about soliders returning home, and maybe he got to know some of them, maybe on of the guys that he was close to he knew very deeply for he says ' the bullet could never kill what you really are' ahhh great wisdom!