Have you ever felt a sickness coming on but completely prevented it from happening using your own natural means?

Everyone is getting sick this week, and I’m afraid I’m up next. Great, just in time for the weekend! I’m starting to feel that general “pre-sickness” malaise coming on…is there ANYTHING I can do to stop this from happening dead in its tracks? If so, have you tried it? Did it work? Or am I just destined to get sick this weekend and there’s no way to stop it?