Flies and the Garbage Can:
No one really blames the flies for the pile of garbage they gather on. What good would it do to kill the flies but not clean the garbage pail?
In the same way, germs "feed" on sick bodies because they are unable to set up housekeeping in healthy ones. Does it make sense to do things to kill the germs, but not do anything to improve and promote health in the body?
Making sure that your spine is free from subluxations is a good way to help optimize your nerve system, which just so happens to control your immune system, as well as, the rest of your body.