"and on the third day he brought his uncle." --Robert Hass
As a precaution, regularly take the following in small doses. On occasions when an agent of illness has entered the body, take the following in large doses:
* Whiskey or whisky
* Excercise
Rest on the fact that you are likely stronger than a microorganism. If it calls your bluff, be prepared to take your body to the brim of collapse. Surely, the germ would die before you do.