Is most of the bacteria on your body harmful?

No it is not, most bacteria is very helpful, it helps the body function and fight off diseases when the body is sick. Sometimes the good bacteria can't fight off the bad bacteria and will cause you to have to buy antibiotics. The antibiotics give the body a huge advantage at fighting off the disease and the body goes back to normal.

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )